"Respiration" PPT courseware

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"Respiration" PPT courseware

Part One: Knowledge Review

The formula for photosynthesis:

1. The site of photosynthesis is chloroplasts

2. The raw materials for photosynthesis are carbon dioxide and water.

3. The driving force of photosynthesis is sunlight (light energy)

4. The products of photosynthesis are organic matter and oxygen

5. The material transformation of photosynthesis is inorganic matter → organic matter

6. The energy transformation of photosynthesis is light energy → chemical energy

Respiration PPT, Part 2: Respiration of plants

What is breathing? Please list the breathing phenomena around you.

Respiration consumes oxygen experiment

Experiment 1: Explore whether seeds absorb oxygen during respiration

Experimental phenomenon: When a burning candle is put into a bottle, the flame goes out immediately. The burning candle was put into bottle B, but the flame did not go out immediately.

The experiment proves: There is a lack of oxygen in bottle A, but there is oxygen in bottle B. The oxygen in bottle A is absorbed by the germinated seeds.

Experiment 2: Explore whether seeds release carbon dioxide during respiration

Properties of carbon dioxide:

Carbon dioxide + clear lime water → lime water becomes turbid

Experimental phenomenon: The gas in bottle A can make the clear lime water turbid, indicating that the gas in bottle A contains a large amount of carbon dioxide.

Experiments have shown that germinating seeds release carbon dioxide.

Respiration PPT, the third part: analysis of knowledge points

1: The principle and significance of respiration

1. The concept of respiration

A process in which plants absorb oxygen from the air, convert the organic matter in the body into carbon dioxide and water, and at the same time release the energy stored in the organic matter.

2.The formula of respiration

Oxygen + organic matter (starch) → carbon dioxide + water + energy

The meaning of respiration

The energy required for various life activities of plants comes from respiration.

2: Plant cells can all perform respiration

1. Seed cells respire all the time

2. All organs of the plant also perform respiration.

Respiration PPT, part 4: test you

1. The part of the plant that performs suction is ( )

A. Only in leaves B. Only in germinated seeds

C. Only in the root system D. Can be carried out in all living cells

2. The time it takes for plants to perform respiration is ( )

A.Only during the day B.Only under the light

C. During the day and night D. Only at night

3. If you water the flowers too frequently, the flower soil always contains a lot of water, which will cause the roots to rot and the plants to die. The reason is. ( )

A. Too much water and the root hairs cannot absorb it

B． Too much water and the roots cannot breathe

C. Too much water allows cells to multiply, causing roots to rot.

D. Roots absorb too much water and die

Keywords: Beijing Normal University edition seventh grade biology PPT courseware free download, respiration PPT download, .PPT format;

For more information about the "Lifestyle Respiration of Green Flowering Plants" PPT courseware, please click the "Lifestyle Respiration of Green Flowering Plants ppt" tag.

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Update Time: 2024-11-22

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 1 industry PPT template

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