Presentation on the topic of the cosmic role of plants. Cosmic role of green plants. III. Exploring a new topic

Equipment

During the classes.

I. Organizational moment.

1) What process is referred to in the quote? “Once upon a time, a ray of the Sun fell on the Earth, but it did not fall on barren soil, it fell on a green blade of grass, or rather, on a chlorophyll grain. Striking against it, it went out, ceased to be light, but did not disappear. He only spent money on internal work…” (K.A. Timiryazev)

2) Work on cards individually (Appendix 1).

III. Exploring a new topic

Carbon dioxide + water + solar energy =

Organic matter (sugar and starch) + oxygen

And so, life on Earth depends on the sun. And the store of its energy are green plants. Photosynthesis is a unique process - because thanks to it, organic substances are formed on earth, from inorganic substances, simply from water and carbon dioxide. Organic matter is then used as food by animals and humans. Thus, the energy of the sun, stored by green plants in sugars, fats and proteins, ensures the life of all life on Earth - from bacteria to humans.

The outstanding Russian scientist Kliment Arkadyevich Timiryazev studied this process and called the role of green plants on Earth - cosmic. (A short message about K.A. Timiryazev)

During our work, we will find out why the role of plants is called cosmic.

Card 1

Accumulation of organic matter

1. What substances are produced during photosynthesis.
2. Where is organic matter stored?
3. 3. Why do they accumulate a lot?

Card 2

Energy storage

1. What substances store energy?
2. Which chemical bonds store energy?
3. Which substances have the most energy?

Card 3

Constancy of carbon dioxide content.

1. How much carbon dioxide is in the atmosphere?
2. By what processes is it formed?
3. What is the importance of plants in the constancy of its composition?

Card 4.

Accumulation of oxygen

1. How much oxygen is in the Earth's atmosphere?
2. How is oxygen used on Earth?
3. What happens to oxygen at an altitude of 25 km and what does this mean for life?

Card 5

Soil creation.

1. How are organic substances used by animals?
2. What happens to organic matter during decay and decomposition of living organisms?
3. What is soil?

Card 6

Soil value.

1. What is humus?
2. What substances are included in the composition of the soil (humus)?
3. What substances do plants take from the soil to grow? (see paragraph 27)

Teacher's question.

Students conclude: “Thanks to chlorophyll, green plants play an extremely important - cosmic - role in the life of our planet. And how important it is to take care of plants.

2. Human influence.

1. 
   
2. 
   
3. 
   
4. 
   
5. 
   
6. 
   
7. 
   

V. Homework:

Is there a presentation?

During the classes:

1. Organizational moment

2.Updating knowledge

2.What about fertilizers?

Learning new material


And he gives people food and oxygen.
A very important process is photosynthesis, friends,
We cannot do without it on Earth.
Fruits, vegetables, bread, coal, hay, firewood -
Photosynthesis is the head of all this.
The air will be clean, fresh, how easy it is for them to breathe!
And the ozone layer will protect us.

The history of the discovery of photosynthesis.

Contribution to science

Dutch physician Jan Ingenhaus

German botanist Julius Sachs

1. Creation of organic in-in

2. Accumulation of organic matter

3. Accumulation of energy

5. Accumulation of O2 in the atmosphere

6.Creating soil

5.What is soil?

6. What is humus?

Cognitive tasks:

The root mass of a small tree is 5 kg. One kg of root mass consumes 1 g of oxygen per day. What mass of oxygen is consumed by the roots of a tree in a month and a year? (: for 30 days - 150 g; for 365 days - 1825 g)

K.A. Timiryazev wrote: “In essence, whatever the farmer produces, he first of all produces chlorophyll and already through chlorophyll receives grain, fiber, wood, etc.”. what agricultural practices contribute to the accumulation of chlorophyll and the enhancement of photosynthesis in the pulp of the leaf? (Answer: applying organic fertilizers to the soil, observing the rules when planting plants, good lighting, observing the rules for watering plants, etc.)

5. Summing up the lesson

Homework§

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"Open lesson on the topic "Space role of plants""

Lesson topic: "Space role of plants"

Target lesson: To form a concept of the role of plants and the process of photosynthesis for life on Earth.

Tasks:

Educational: Explanation of the role of plants on Earth and the concept of plants as sources of organic matter, energy storage, oxygen storage. Explain the relationship between living and non-living things. Give the concept of the role of plants as cosmic, playing a huge role in the life of the planet.

Educational: The development of intellectual thinking, the development of group work skills, the ability to work with a textbook, the ability to analyze, compare and draw independent conclusions.

Educational: respect for nature, understanding the meaning of plants,

Equipment: multimedia projector, computer, cards.

During the classes.

I. Organizational moment.

The class is divided into 6 groups. The work takes place in groups, then the generalization of the material by the whole class.

II. Repetition of the studied topic "photosynthesis"

Repetition of the studied material. Task for all groups.

1) What process is referred to in the quote? “... Once upon a time a ray of the Sun fell on the Earth, but it did not fall on barren soil, it fell on a green blade of grass, or rather, on a chlorophyll grain. Striking against it, it went out, ceased to be light, but did not disappear. He only spent money on internal work…” (K.A. Timiryazev)

2) Work on cards individually ( Appendix 1).

Wellness moment: exercises for the fingers and eyes.

III. Exploring a new topic

1. Space role of plants.

In the last lesson, we talked about the most important process on Earth - photosynthesis. Let's repeat the process formula again. Writing formulas on the blackboard.

And so, life on Earth depends on the sun. And the store of its energy are green plants. Photosynthesis is a unique process - because thanks to it, organic substances are formed on earth, from inorganic substances, simply from water and carbon dioxide. Organic substances are then used as food by animals and humans. Thus, the energy of the sun, stored by green plants in sugars, fats and proteins, ensures the life of all life on Earth - from bacteria to humans.

The outstanding Russian scientist Kliment Arkadyevich Timiryazev studied this process and called the role of green plants on Earth - space. (A short message about K.A. Timiryazev)

During our work, we will find out why the role of plants is called cosmic.

Work in groups on cards.

After working in groups on cards on the board, one student from the group writes down the most important conclusions. Students write their findings in their notebooks.

The conclusions should be something like this:

Plants produce organic matter to feed other organisms.

The energy of the sun is stored in plants and transferred to other organisms.

By absorbing carbon dioxide emitted by animals, and during rotting and burning, plants maintain its constant composition in the atmosphere.

Plants produce oxygen for breathing and the ozone layer that protects living organisms.

When plants and animals decompose, a soil rich in minerals is formed, which can again be used by plants.

Teacher's question. What is the relationship between animate and inanimate nature?

Now let's draw up a diagram of the interaction of animate and inanimate nature.

Conclusion: What is the cosmic role of plants?

Students conclude: “Thanks to chlorophyll, green plants play an extremely important - cosmic - role in the life of our planet. And how important it is to take care of plants.

2. Human influence.

Small messages from students about the role of man and his influence on the constancy of the gas composition of the atmosphere.

1) Pollution of the atmosphere with gases and an increase in carbon dioxide, the "greenhouse effect".

2) Ozone "holes" and the state of oxygen in the atmosphere.

3) Deforestation and fires, the impact on the ratio of oxygen and carbon dioxide.

4). Soil changes, especially in cities, due to autumn leaf harvesting.

IV. Consolidation of the studied material.

Green plants, absorbing solar energy, form:
a) organic matter; b) mineral; c) do not form anything

In the fields after harvest, minerals absorbed by plants:
a) return to the soil; b) do not return to the soil; c) they are not in the soil.

With the help of chlorophyll from carbon dioxide in the leaf are formed:
a) organic matter; b) inorganic substances; c) nothing happens.

Green plants, absorbing the energy of the sun, convert it into:
a) into the energy of chemical bonds; b) thermal energy; c) do not convert.

The role of green plants is called cosmic because:
a) they receive solar energy from space; b) because our planet is in space; c) do not receive energy from space.

With the advent of plants on earth appeared:
a) oxygen; b) carbon dioxide; c) nitrogen

The solar energy received from space is stored by plants in the form of:
A) proteins; b) carbohydrates (sugars); c) together.

V. Homework:

Paragraph ___. Make a colorful colorful scheme "The relationship of animate and inanimate nature"

Topic: Space role of green plantsthere is a presentation

Purpose: deepening knowledge about photosynthesis, about the importance of energy and accumulated organic mass by plants. To reveal the cosmic role of green plants. Emphasize the importance of photosynthesis in nature and human life. Draw students' attention to the problem of air pollution.

During the classes:

1. Organizational moment

2.Updating knowledge

1. With a lack of which element, the image of chloroplasts and chlorophyll is disturbed?

A) magnesium; b) nitrogen; c) phosphorus; d) potassium

2.What about fertilizers?

A) copper; b) boron; c) ash; c) manganese

3. What is the name of the organ of air nutrition of plants?

A) root b) flower; c) sheet; d) seed

4. What is the name of the org-we capable of independently synthesizing organic matter?

A) heterotrophs; b) autotrophs; c) succulents; d) ephemeroids

5. What process in plants is associated with the absorption of CO2, water and mineral salts?

A) breathing b) food; c) reproduction; d) growth

6. What is the name of the org-we, are not able to independently synthesize organic matter?

A) succulents;) ephemeroids; c) autotrophs; d) heterotrophs

(air)

(fertilize)

(root)

10. Fertilizers are miner and (organic)

Learning new material

Photosynthesis takes place throughout the year.
And he gives people food and oxygen.
A very important process is photosynthesis, friends,
We cannot do without it on Earth.
Fruits, vegetables, bread, coal, hay, firewood -
Photosynthesis is the head of all this.
The air will be clean, fresh, how easy it is for them to breathe!
And the ozone layer will protect us.

A lot of foreign and domestic scientists studied the mechanisms of this amazing process.

The history of the discovery of photosynthesis.

Independent work with the textbook page ________

Space role of green plants

1. Creation of organic in-in

2. Accumulation of organic matter

3. Accumulation of energy

4. Ensuring the constancy of the CO2 content in the atmosphere

5. Accumulation of O2 in the atmosphere

6.Creating soil

4.Fixation of new material

1. Why is it necessary to protect plants?

2. Why is % O2 in the atmosphere constant?

3. What is the role of plants in the life of heterotrophs?

4. What is the connection between animate and inanimate nature?

5.What is soil?

6. What is humus?

7. What scientist called the role of green plants on Earth cosmic?

Cognitive tasks:

The root mass of a small tree is 5 kg. One kg of root mass consumes 1 g of oxygen per day. What mass of oxygen is consumed by the roots of a tree in a month and a year? (: for 30 days - 150 g; for 365 days - 1825 g)

Which plant deposits more dust on the leaf surface: elm or poplar? Why? (The elm leaf is rough, it will deposit dust 6 times more than the smooth surface of the poplar leaf)

Is there a relationship between picking leafy vegetables (dill, spinach, lettuce, etc.) and time of day? Why? (In the evening, since at this time the maximum of organic substances formed during the day in the process of photosynthesis accumulates, and at night there is an outflow of these substances to other organs.)

The hostess at their summer cottage cut green cabbage leaves to feed the rabbits. Did she do the right thing? Why? (No, that's wrong. Organic substances formed in green leaves during photosynthesis flow into the white leaves of the head, where they accumulate)

A person consumes 430 g of oxygen per day. One hectare of forest produces in an hour as much oxygen as is needed for the breathing of two hundred people. What mass of oxygen is emitted by a hectare of forest in one hour? (Answer: 3580 g)

In the process of photosynthesis, cucumbers grown in greenhouses absorb 1 kg of carbon dioxide during the formation of 7 kg of fruits. How many kg of carbon dioxide will be required to produce 300 kg of cucumbers? How can you increase the amount of carbon dioxide in the air in greenhouses? (Answer: 42.85 kg; the introduction of manure and peat into the soil enriches the above-ground layer of air with carbon dioxide, which is released from the soil during the decomposition of organic substances by microorganisms)

K.A. Timiryazev wrote: “In essence, whatever the farmer produces, he first of all produces chlorophyll and already through chlorophyll receives grain, fiber, wood, etc.”. what agricultural practices contribute to the accumulation of chlorophyll and the enhancement of photosynthesis in the pulp of the leaf? (Answer: applying organic fertilizers to the soil, observing the rules when planting plants, good lighting, observing the rules for watering plants, etc.)

5. Summing up the lesson

Homework§

Picture 1.

1. Cards for checking homework.

1. What processes are shown by arrows. Sign.

2. Solve cognitive problems.

a) Why are apples sweet?

b) Lettuce was cut in the morning - the most juicy, in the evening - the sweetest, in the afternoon - weighed the least. Explain.

c) Mowed potato tops - the lowest yield, and cut off the flowers - the highest. Why?

Fixation test

1. Green plants, absorbing solar energy, form:
a) organic matter; b) mineral; c) do not form anything

2. In the fields after harvesting, minerals absorbed by plants:
a) return to the soil; b) do not return to the soil; c) they are not in the soil.

3. With the help of chlorophyll from carbon dioxide in the leaf are formed:
a) organic matter; b) inorganic substances; c) nothing happens.

4. Green plants, absorbing the energy of the sun, convert it into:
a) into the energy of chemical bonds; b) thermal energy; c) do not convert.

5. The role of green plants is called space because:
a) they receive solar energy from space; b) because our planet is in space; c) do not receive energy from space.

6. With the advent of plants on earth appeared:
a) oxygen; b) carbon dioxide; c) nitrogen

7. The energy of the sun received from space is stored by plants in the form of:
A) proteins; b) carbohydrates (sugars); c) together.

Homework test

1. With a lack of which element, the image of chloroplasts and chlorophyll is disturbed?

A) magnesium; b) nitrogen; c) phosphorus; d) potassium

2.What about fertilizers?

A) copper; b) boron; c) ash; c) manganese

3. What is the name of the organ of air nutrition of plants?

A) root b) flower; c) sheet; d) seed

4. What is the name of the org-we capable of independently synthesizing organic matter?

A) heterotrophs; b) autotrophs; c) succulents; d) ephemeroids

5. What process in plants is associated with the absorption of CO2, water and mineral salts?

A) breathing b) food; c) reproduction; d) growth

6. What is the name of the org-we, are not able to independently synthesize organic matter?

A) succulents;) ephemeroids; c) autotrophs; d) heterotrophs

7. What is the name of plant nutrition based on photosynthesis?

8. What measures are taken to prevent soil depletion and increase crop yields?

9. What is soil nutrition called?

Homework test

1. With a lack of which element, the image of chloroplasts and chlorophyll is disturbed?

A) magnesium; b) nitrogen; c) phosphorus; d) potassium

2.What about fertilizers?

A) copper; b) boron; c) ash; c) manganese

3. What is the name of the organ of air nutrition of plants?

A) root b) flower; c) sheet; d) seed

4. What is the name of the org-we capable of independently synthesizing organic matter?

A) heterotrophs; b) autotrophs; c) succulents; d) ephemeroids

5. What process in plants is associated with the absorption of CO2, water and mineral salts?

A) breathing b) food; c) reproduction; d) growth

6. What is the name of the org-we, are not able to independently synthesize organic matter?

A) succulents;) ephemeroids; c) autotrophs; d) heterotrophs

7. What is the name of plant nutrition based on photosynthesis?

8. What measures are taken to prevent soil depletion and increase crop yields?

9. What is soil nutrition called?

10. Fertilizers are miner and …………

Open lesson in 6th grade

Topic: “Photosynthesis. The cosmic role of green plants"

Epigraph: “The time for miracles has passed, and we

have to look for reasons

everything that happens in the world."

W. Shakespeare

Lesson Objectives: deepening knowledge about photosynthesis, about the importance of energy and accumulated

organic matter of plants.

Lesson objectives:

deepen and expand ideas about plant nutrition;

tell about the history of the discovery of photosynthesis, about the conditions necessary

for this process; show the role of light as a necessary condition for the flow

photosynthesis;

to instill practical skills and habits of bookmarking and conducting experiments and

observations;

based on experiments to prove the absorption of carbon dioxide and the release of oxygen

leaves in the light;

reveal the cosmic role of green plants;

emphasize the importance of photosynthesis in nature and human life;

draw students' attention to the problem of air pollution.

Preliminary preparation for the lesson: a week before the lesson, a group of students on instructional cards lays two experiments: 1. “Saks test” 2. release of oxygen during photosynthesis. Students who carry out laboratory research during the lesson are instructed in safety precautions.

Pedagogical technologies: problem-developing training, the method of heuristic questions - “who? -what? -where? -how? -why? -as? -when?" (verbal formula of Cicero), elements of heuristic conversation.

Lesson equipment: plants kept in the dark; laboratory equipment: alcohol, a glass of water, iodine, an alcohol burner, glass caps, glass jars with lids, a torch; photosynthesis table, slide presentation, projector, COR. Interactive test .

Planned learning outcomes:

The student must know:

- that photosynthesis is air nutrition;

- that the ability to photosynthesis is the most important property of green plants;

- the conditions necessary for the flow of photosynthesis;

- that as a result of photosynthesis, organic substances are formed in plants;

- that atmospheric oxygen is a by-product of photosynthesis.

During the classes.

Learning new material.

Introduction. Today we will take a virtual tour of the Green Plants factory. The journey will be unusual and exciting. We have to look into the most unusual workshops, find out what they produce and why the plant needs it. (slide number 1).

1. Factory management.

But first, I suggest you get acquainted with the management of this factory. These are her pioneers. (slide number 2).

1) Acquaintance of students with a historical fact (creating a problem situation slide number 3): More than four hundred years ago, the Belgian naturalist Jan Van - Helmont set up an experiment - placed 80 kilograms of earth in a pot and planted a willow branch in it, after weighing it. For five years, the plant growing in a pot was not given any nutrition, but only watered with rainwater that did not contain mineral salts. After weighing the willow, five years later, the scientist found that its weight increased by 65 kilograms, and the weight of the earth in the pot decreased by only 50 grams. Where the plant got 64 kg 950 g of nutrients for Van - Helmont remained a mystery.

To answer a question that a famous scientist could not answer at one time. ( )

2) Acquaintance of students with the experience of another scientist - D. Priestley. He put the mouse under a glass jar, and five hours later the animal died. When a sprig of mint was introduced under the cap, the mouse remained alive. (slide number 4).

Question. What conclusion did the scientist come to?

During the discussion, we determine that the leaves of plants are a kind of laboratory in which organic substances are formed in the light. This process is perhaps the most remarkable biological phenomenon taking place on our planet. Thanks to him, all life on Earth exists. Today in the lesson we have to reveal the mechanisms of this biological process. As you guessed, we will talk about photosynthesis.

Poetry (recited by the teacher).

Photosynthesis takes place throughout the year.

And he gives people food and oxygen.

A very important process is photosynthesis, friends,

We cannot do without it on Earth.

Fruits, vegetables, bread, coal, hay, firewood -

Photosynthesis is the head of all this.

The air will be clean, fresh, how easy it is for them to breathe!

And the ozone layer will protect us.

A lot of foreign and domestic scientists studied the mechanisms of this

amazing process.

The history of the discovery of photosynthesis.

Dutch physician Jan Ingenhaus

In the course of the experiment, he discovered that plants are able to release oxygen only in the presence of sunlight, and that only their green parts are able to provide oxygen.

1782

Swiss scientist Jean Senebier

He experimentally proved that organic substances in plants are formed from carbon dioxide, which, under the influence of sunlight, decomposes in green plant organelles.

1804

French plant physiologist Jacques Boussingault

In the course of laboratory work, I came to the conclusion that water is also consumed by plants in the synthesis of organic substances.

1864

German botanist Julius Sachs

He proved that the ratio of the volumes of carbon dioxide absorbed and oxygen released is 1:1. demonstrated the formation of starch grains during photosynthesis.

Question: Guys, what do you know about this process? How to prove that this process

really exists and is very important for plants?

( listening to student responses )

Expert department.

3) Let's go to the expert department and check your versions.

Demonstration of the results of the experiment "The role of light for the formation of starch"

As proof of the existence of the photosynthesis process, a group of students talk about what experience they have laid down and put forward hypotheses, what will be the results of the experiment. Then one student, under the guidance of a teacher, demonstrates an experiment confirming the formation of starch in leaves in the light. (experience is laid for the lesson - “Saks test”) . Tokmakova Alina

Vorokov Azamat

Another student comments and fixes the intermediate and final results of the experiment and expresses the words of K.A. Timiryazev:

“Once, somewhere, a ray of the sun fell on Earth, but it did not fall on barren soil, it fell on a green blade of wheat, or, better to say, on a chlorophyll grain. Hitting it, it went out, ceased to be light, but did not disappear ... In one form or another, it entered the composition of the bread, which served as food for us. It has transformed into our muscles, into our nerves… This ray of the sun warms us. He sets us in motion. Perhaps at this moment he is playing in our brain.

For the experiment, plants are used -, geranium. One plant is abundantly watered and placed in a dark place for two days to drain the starch. The other plant is left in the light. Then the first plant is removed from the closet, and figures cut out of thick black paper are attached to its leaves. Both plants are kept in the light for three to four days, watering. Then, a leaf is cut from each plant, kept for two or three minutes in boiling water and placed in a glass with hot alcohol to obtain an extract of chlorophyll. Discolored leaves are treated with iodine solution. On the leaf of the plant that has been in the closet, the configuration of the figurine that was attached to it will appear. A leaf that has always been exposed to light will turn uniformly blue.

Question to the class : Which substance turns blue when treated with iodine solution?

(starch, when interacting with iodine, gives a blue color).

When discussing the results of the experiment, students come to the conclusion that starch is formed in the leaves in the light, and starch is not formed in the dark.

4. Factory laboratory.

4) And now we are going to the laboratory of this factory to get acquainted with the very important plant organelles that play a major role in the process of photosynthesis.

Photosynthesis - the process of formation of organic substances from carbon dioxide and water with the participation of the energy of sunlight. (from the Greek "photo" - light, "synthesis" - education)

The green color of plants is the color of the chemical substance chlorophyll (from the Greek "chloros" - green, "philos" - leaf), which is found in the plastids of the cell in the chloroplasts. This substance plays a major role in photosynthesis. The process of photosynthesis is multi-stage. It is triggered when a particle of light (photon) hits a chlorophyll molecule. There are two phases in the process of photosynthesis. The light phase occurs only in the light and the longer, dark phase does not need light. In the light phase, oxygen is released, energy is generated, in the dark phase, carbohydrate (glucose) is synthesized. Slide number

Word of the teacher: The Roman orator Cicero said that any mechanism or process can be described by answering seven simple questions - “who? what? where? how? why? as? when?" Try and you describe photosynthesis by answering these questions

( students' answers are listened to, the teacher's answer is offered ).

At the end of the conversation, students complete the table

"Photosynthesis"

1. Photosynthesis is a scientific fact.

2. Cause of photosynthesis.

3. Conditions for photosynthesis.

4. By-product of photosynthesis.

5. Photosynthesis is a living factory.

6. The result of photosynthesis.

Teacher's word. Plants annually form more than 100 billion tons of organic substances, emit about 145 billion tons of oxygen into the atmosphere. 80% of oxygen is released by algae and only 20% by land plants. Therefore, the oceans are sometimes called the "lungs of the planet." The cost of oxygen for the respiration of humans, animals, and plants is compensated by photosynthesis. The oxygen content in the atmosphere is maintained within 21%.

Question. How can you increase the rate of photosynthesis?

( students hypothesize ). If you improve the conditions necessary for photosynthesis, then the rate of its flow will increase.

Question. Where and how can such conditions be created?

(in greenhouses and greenhouses, a person creates certain conditions - illumination, temperature, mineral nutrition of plants, carbon dioxide concentration. All these conditions increase the rate of photosynthesis).

Question. Why does a person create such conditions?

(for faster growth and development of plants, the formation of fruits and seeds).

5. Settlement department. We go to the accounting department and try to calculate the amount of products obtained as a result of photosynthesis.

Cognitive tasks:

The root mass of a small tree is 5 kg. One kg of root mass consumes 1 g of oxygen per day. What mass of oxygen is consumed by the roots of a tree in a month and a year?(: for 30 days - 150 g; for 365 days - 1825 g)

Which plant deposits more dust on the leaf surface: elm or poplar? Why?(the elm leaf is rough, it will deposit dust 6 times more than the smooth surface of the poplar leaf)

Is there a relationship between picking leafy vegetables (dill, spinach, lettuce, etc.) and time of day? Why?(: in the evening, because at this time the maximum of organic substances formed during the day in the process of photosynthesis accumulates, and at night there is an outflow of these substances to other organs.)

The hostess at their summer cottage cut green cabbage leaves to feed the rabbits. Did she do the right thing? Why?(no, wrong. Organic substances formed in green leaves during photosynthesis flow into the white leaves of the head, where they accumulate)

A person consumes 430 g of oxygen per day. One hectare of forest produces in an hour as much oxygen as is needed for the breathing of two hundred people. What mass of oxygen is emitted by a hectare of forest in one hour?(answer: 3580 g)

In the process of photosynthesis, cucumbers grown in greenhouses absorb 1 kg of carbon dioxide during the formation of 7 kg of fruits. How many kg of carbon dioxide will be required to produce 300 kg of cucumbers? How can you increase the amount of carbon dioxide in the air in greenhouses?(answer: 42.85 kg; the introduction of manure and peat into the soil enriches the above-ground layer of air with carbon dioxide, which is released from the soil during the decomposition of organic substances by microorganisms)

K.A. Timiryazev wrote: “In essence, whatever the farmer produces, he first of all produces chlorophyll and already through chlorophyll receives grain, fiber, wood, etc.” what agricultural practices contribute to the accumulation of chlorophyll and the enhancement of photosynthesis in the pulp of the leaf? (answer: applying organic fertilizers to the soil, following the rules when planting plants, good lighting, observing the rules for watering plants, etc.)

Teacher's word.

Guys, we are completing a virtual trip to the green plant factory with you. It remains for us to visit the department of educational control to test our knowledge and get homework.

Department of educational control.

II .Consolidation of the studied material.

Questions:

What is photosynthesis?

What is produced in leaves during photosynthesis?

What conditions are necessary for photosynthesis?

What is the cosmic role of green plants?

Run test:

Photosynthesis takes place...

a) in the stomata;

b) in the intercellular spaces;

c) in chloroplasts,

2. In the process of photosynthesis, ...

a) taking in oxygen and releasing carbon dioxide

b) the absorption of carbon dioxide and the formation of oxygen.

3. Starch, which is formed in the leaves during photosynthesis, is needed by the plant for ...

a) its release into the external environment;

b) supply them with all parts of the plant.

4. Chlorophyll in the cell is ...

a) in the nucleus

b) in plastids;

c) in the cytoplasm.

5. Starch, formed in the leaves during photosynthesis, is ...

a) a reserve nutrient;

b) a by-product of metabolism.

6. First studied the mechanism of plant growth ...

a) D. Priestley;

b) Jan Van Helmont;

c) K.A. Timiryazev.

7. What substances are necessary for photosynthesis?

a) oxygen and water

b) oxygen and carbon dioxide

c) water and carbon dioxide

d) carbon dioxide.

8. Why is starch found in the green part of the leaf, but not in the white part?

a) no oxygen supply

b) no carbon dioxide is supplied

c) water is not flowing

d) there is no chlorophyll

9. Establish a correspondence between the groups of substances involved in the process

photosynthesis, and the names of these substances.

3) water

4) chlorophyll

5) organic matter

6) salt

12. Describe two types of plant nutrition.

Biological dictation: (Interactive mode)

1. Types of food….

2. The main function of nutrition….

3. With soil nutrition, plants absorb ....

4. With soil nutrition, plants absorb water and minerals dissolved in it with the help of ....

5. Minerals dissolved in water from the root to other parts of the plant move along ....

6. The entry of water and minerals into the root occurs only in the zone ....

III Homework.

Compare the processes of photosynthesis and respiration and answer the questions:

What time of day does it happen?

What gas is absorbed?

What gas is released?

Is heat absorbed or released?

In what cells does it occur?

Is the mass increasing or decreasing?

Is organic matter formed or destroyed?

2. Write out the terms on the topic "Photosynthesis" and give them a definition.

Creative tasks for individual students.

3. Compose a story about the structural features of the leaf associated with the implementation of the process of photosynthesis.

4. Draw and explain the results of D. Priestley's experiments.

The plan of the open lesson was

biology teacher

MKOU "SOSH №3" s.p. Malka, Zolsky district, KBR

Bichoeva Marina Barazbievna

"Forest complex" - S (the area of ​​the territory occupied by the forest) L \u003d S (the total area of ​​​​the district). Wood products. The largest timber industry complexes: Waste in logging areas. Integrated processing and disposal of waste. Krasnoyarsk, Bratsk, Ust-Ilimsk. Greater use of secondary raw materials. Mixed forest.

"The cosmic role of green plants" - A person consumes 430 g of oxygen per day. Photosynthesis. What mass of oxygen is emitted by a hectare of forest in one hour? Expert department. What mass of oxygen is consumed by the roots of a tree in a month and a year? Fill in the table: "Photosynthesis". The resulting carbohydrates are used as food, and oxygen enters the atmosphere.

"Birch - a symbol of Russia" - Birch Grove. Birch in the works of artists. And in autumn, the birch is among the first to put on a beautiful golden dress. The crown is most often ovoid in shape. A. I. Kuindzhi. Savrasov A.K. The Rooks Have Arrived. The white-trunked tender birch has long been the embodiment of the Russian nature of Russia. Birch bark - birch bark in many species is white.

"Trees shrubs grass" - Plants live everywhere: in meadows, forests, steppes, mountains, seas and oceans. Children's encyclopedia "I know the world. How are trees different from other plants? What plants grow in our area? Variety of plants. Trees are: deciduous and coniferous. Trees Shrubs Herbs. I think that.

"Smart garden" - - an important thing for greenery. Sources. It has "collision sensors". Equipped with a theft warning system. Intelligent automation will water the lawn strictly on schedule. Lighting. Virtually silent and absolutely no annoying exhaust. All the functions of smart light that are in the house are also implemented on the street.

"Signs of plants" - The main signs of plants. Variety of plants. The plant kingdom has about 350 thousand species. Botany is the science that studies plants. Plant habitats. Land plants oak, lily of the valley, lingonberry, cactus, etc. Learn to recognize plants of different habitats. Aquatic plants, algae, lilies, water lilies, etc.

There are 10 presentations in total in the topic

Lesson : № 26.

Class: 6.

Thing: biology.

the date of the : __________________.

Subject: The cosmic role of green plants: the creation of organic substances, the accumulation of energy, the maintenance of a constant content of carbon dioxide and the accumulation of oxygen in the atmosphere, participation in the creation of soil on Earth.

Lesson type : The study of NM.

Target lesson : To form a concept of the role of plants and the process of photosynthesis for life on Earth.

Tasks:

Educational: Explanation of the role of plants on Earth and the concept of plants as sources of organic matter, energy storage, oxygen storage. Explain the relationship between living and non-living things. Give the concept of the role of plants as cosmic, playing a huge role in the life of the planet.

Educational : The development of intellectual thinking, the development of group work skills, the ability to work with a textbook, the ability to analyze, compare and draw independent conclusions.

Educational : respect for nature, understanding the meaning of plants,

Equipment : multimedia projector, computer, cards.

During the classes:

I. Organizational moment.

The class is divided into 6 groups. The work takes place in groups, then the generalization of the material by the whole class.

II. Repetition of the studied topic "photosynthesis" - Challenge stage.

Repetition of the studied material. Task for all groups.

1) What process is referred to in the quote? “... Once upon a time a ray of the Sun fell on the Earth, but it did not fall on barren soil, it fell on a green blade of grass, or rather, on a chlorophyll grain. Striking against it, it went out, ceased to be light, but did not disappear. He only spent money on internal work…” (K.A. Timiryazev)

2) Work on cards individually ( ).

Wellness moment: exercises for the fingers and eyes.

III. The study of new material is the stage of comprehension.

1. Space role of plants.

In the last lesson, we talked about the most important process on Earth - photosynthesis. Let's repeat the process formula again. Writing formulas on the blackboard.

Organic matter (sugar and starch) + oxygen

And so, life on Earth depends on the sun. And the store of its energy are green plants. Photosynthesis is a unique process - because thanks to it, organic substances are formed on earth, from inorganic substances, simply from water and carbon dioxide. Organic substances are then used as food by animals and humans. Thus, the energy of the sun, stored by green plants in sugars, fats and proteins, ensures the life of all life on Earth - from bacteria to humans.

The outstanding Russian scientist Kliment Arkadyevich Timiryazev studied this process and called the role of green plants on Earth - space. (A short message about K.A. Timiryazev)

During our work, we will find out why the role of plants is called cosmic.

Work in groups on cards.

Accumulation of organic matter

What substances are produced during photosynthesis.

Where is organic matter stored?

3. Why do they accumulate a lot?

Energy storage

What substances store energy?

Which chemical bonds store energy?

Which substances have the most energy?

Constancy of carbon dioxide content.

How much carbon dioxide is in the atmosphere?

By what processes is it formed?

What is the importance of plants in the constancy of its composition?

Accumulation of oxygen

How much oxygen is in the Earth's atmosphere?

How is oxygen used on Earth?

What happens to oxygen at an altitude of 25 km and what does this mean for life?

Soil creation.

How are organic substances used by animals?

What happens to organic matter during decay and decomposition of living organisms?

What is soil?

Soil value.

What is humus?

What substances are included in the composition of the soil (humus)?

What substances do plants take from the soil to grow? (see paragraph 27)

After working in groups on cards on the board, one student from the group writes down the most important conclusions. Students write their findings in their notebooks.

The conclusions should be something like this:

Plants produce organic matter to feed other organisms.

The energy of the sun is stored in plants and transferred to other organisms.

By absorbing carbon dioxide emitted by animals, and during rotting and burning, plants maintain its constant composition in the atmosphere.

Plants produce oxygen for breathing and the ozone layer that protects living organisms.

When plants and animals decompose, a soil rich in minerals is formed, which can again be used by plants.

Teacher's question. What is the relationship between animate and inanimate nature?

Now let's draw up a diagram of the interaction of animate and inanimate nature.

Conclusion: What is the cosmic role of plants?

Students conclude: “Thanks to chlorophyll, green plants play an extremely important - cosmic - role in the life of our planet. And how important it is to take care of plants.

2. Human influence.

Small messages from students about the role of man and his influence on the constancy of the gas composition of the atmosphere.

1) Pollution of the atmosphere with gases and an increase in carbon dioxide, the "greenhouse effect".

2) Ozone "holes" and the state of oxygen in the atmosphere.

3) Deforestation and fires, the impact on the ratio of oxygen and carbon dioxide.

4). Soil changes, especially in cities, due to autumn leaf harvesting.

IV. Consolidation of the studied material - Stage of reflection.

Tests.

Green plants, absorbing solar energy, form:
a) organic matter; b) mineral; c) do not form anything

In the fields after harvest, minerals absorbed by plants:
a) return to the soil; b) do not return to the soil; c) they are not in the soil.

With the help of chlorophyll from carbon dioxide in the leaf are formed:
a) organic matter; b) inorganic substances; c) nothing happens.

Green plants, absorbing the energy of the sun, convert it into:
a) into the energy of chemical bonds; b) thermal energy; c) do not convert.

The role of green plants is called cosmic because:
a) they receive solar energy from space; b) because our planet is in space; c) do not receive energy from space.

With the advent of plants on earth appeared:
a) oxygen; b) carbon dioxide; c) nitrogen

The solar energy received from space is stored by plants in the form of:
A) proteins; b) carbohydrates (sugars); c) together.

V. Homework:

Paragraph ___. Make a colorful colorful scheme "The relationship of animate and inanimate nature"