"Respiration of Green Plants" Green Plants and Carbon-Oxygen Balance in the Biosphere PPT Courseware 6

Description

"Respiration of Green Plants" Green Plants and Carbon-Oxygen Balance in the Biosphere PPT Courseware 6

learning target

1. Know that respiration is ubiquitous in the biological world.

2. Explain the concept and reaction formula of respiration of green plants through demonstration experiments.

3. Give examples of the application of the principle of respiration in agricultural production and daily life.

Experiment 1:

Explore whether seeds absorb oxygen when they germinate

Experiment 2: Explore whether seeds release carbon dioxide during respiration

Properties of carbon dioxide: Carbon dioxide makes clear limewater cloudy

respiration

The concept of respiration: The process in which green plants absorb oxygen, decompose organic matter into carbon dioxide and water, and release energy at the same time is called respiration.

reaction of respiration

Organic matter (storage energy) + oxygen - carbon dioxide + water + energy (release energy)

The meaning of respiration

Part of the energy released by plants through respiration is converted into heat energy and dissipated, and the rest is used for various life activities of the plant.

Factors affecting respiration

Oxygen The greater the oxygen content, the stronger the respiration.

Moisture: The more moisture within a certain range, the stronger the respiration.

Temperature The higher the temperature within a certain range, the stronger the respiration.

Concentration of carbon dioxide The higher the concentration of carbon dioxide, the weaker the respiration.

life practice

1. Why must the grain be dried before it is put into the warehouse?

Reduce water content and weaken respiration

2. Why do we need to loosen the soil frequently when planting flowers and crops?

Increase oxygen content and enhance respiration

3. Why should vegetables and fruits be kept at low temperatures when stored?

Reduce temperature and reduce respiration

Knowledge expansion

Some people say that green plants perform photosynthesis during the day and respiration at night. Does this statement make sense and why?

This argument makes no sense. Green plants perform photosynthesis during the day, but cannot perform photosynthesis at night because there is no sunlight. Living plant cells can respire, and all living cells respire all the time, so green plants respire all the time no matter it is day or night.

The relationship between them!

Without the organic matter produced by photosynthesis, respiration would not be possible. This is because the organic matter decomposed by respiration is the product of photosynthesis, and the energy released by respiration is exactly the energy stored in the organic matter by photosynthesis.

Without respiration, photosynthesis cannot take place. This is because when plants perform photosynthesis, the energy required for the absorption of raw materials and transportation of products is released by respiration.

Respiration and photosynthesis are both antagonistic and interdependent.

Vegetables that have been piled for a long time will rot due to heat. Why can vegetables piled together generate heat?

Because: vegetables generate heat when they respire

Winter is here, and my mother bought a few pots of green plants to beautify her son's room. At the same time, when the weather gets cold, she can purify the air without opening the windows. The whole family is very happy. However, as time goes by, her son feels that the room is stuffy when he sleeps at night. I felt very strange. Why do I feel stuffy when I sleep at night when I put green plants in a closed room in winter?

Because: plants absorb oxygen during respiration, which reduces indoor oxygen, causing people to feel stuffy due to lack of oxygen.

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For more information about the PPT courseware "Respiration of Green Plants Green Plants and Carbon-Oxygen Balance in the Biosphere", please click the Respiration of Green Plants ppt Green Plants and Carbon-Oxygen Balance in the Biosphere ppt tag.

"Respiration of Green Plants" PPT courseware:

"Respiration of Green Plants" PPT Courseware Part One: Situation Introduction Some people believe that green plants absorb carbon dioxide and release oxygen through photosynthesis, which can renew the air in the room, so they place many pots of green plants in the bedroom. What do you think of doing this...

"Respiration of Green Plants" PPT:

"Respiration of Green Plants" PPT Part One Content: Learning Objectives 1. Describe the respiration of green plants and outline the process of respiration. 2. Explain the difference and connection between photosynthesis and respiration, and give examples of the relationship between respiration and human production and life..

"Respiration of Green Plants" Carbon-Oxygen Balance in Green Plants and the Biosphere PPT Courseware 5:

"Respiration of Green Plants" Green Plants and Carbon-Oxygen Balance in the Biosphere PPT Courseware 5 1. The process of respiration of green plants Demonstration Experiment 1 Discussion: Why is the temperature of germinated seeds higher than that of cooked seeds? Seeds germinate, organic matter changes, and...

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Update Time: 2024-07-25

This template belongs to biology courseware People's Education Edition seventh grade biology volume 1 industry PPT template

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