"Green plants are the producers of organic matter in the biosphere" PPT courseware 6

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"Green plants are the producers of organic matter in the biosphere" PPT courseware 6

Review the past and learn the new

1. Comparing plant cells with animal cells, plant cells have structures that animal cells do not have: _________, _________, _________, among which _________ is the site of photosynthesis.

2. The energy converters in cells include _________ and _________; photosynthesis converts ________ energy into _________ energy.

2. Plants are _________ in the ecosystem because they can produce _________ through _________.

3. The endosperm of corn seeds contains ________, which will turn ________ color when exposed to iodine.

Explore experiments:

Are the organic substances produced by green leaves under light starch?

How to check?

How to explore whether light is an indispensable condition for green leaves to produce organic matter?

Explore: Green leaves create organic matter under light

Which of the following three variables is best controlled?

1. There are two plants A and B of the same species. A is in the light and B is in the dark.

2. There are two pieces of a plant, A and B. A is exposed and B is shielded from light on both sides with black paper.

3. One leaf of a plant, half exposed, half covered with black paper on both sides.

water heating

Water-isolated heating: control temperature to prevent alcohol vapor from burning

Alcohol: dissolves chlorophyll

Knowledge summary:

1. In addition to organic matter, the products of photosynthesis of plants also include oxygen.

2. Photosynthesis uses carbon dioxide and water as raw materials.

Concept of photosynthesis(P121)

Green plants use light energy to synthesize water and carbon dioxide into starch and other organic matter in their chloroplasts, and release oxygen to convert light energy into chemical energy and store it in the organic matter.

Raw materials: water and carbon dioxide; products: starch, oxygen;

Conditions: light, chloroplasts; place: chloroplasts.

Essence: Light energy is converted into chemical energy; inorganic matter is converted into organic matter.

1. The organic matter produced by green leaves under light is ( )

A. Starch B. Protein C. Fat D. Inorganic salt

2. The indispensable condition for green plants to produce organic matter is ( )

A.Moisture B.Air C.Light D.Temperature

3. The place where photosynthesis takes place is ( )

A. Mitochondria B. Chloroplasts C. Vacuoles D. Cell wall

4. In the experiment of green leaves producing organic matter under light, the purpose of placing potted geraniums in a dark place for a day and night is ( )

A. Facilitates detection of starch content B. Facilitates removal of chlorophyll

C. Allow the original starch in the leaves to be transported away and consumed D. Facilitate inspection with iodine solution

5. In the experiment of "green leaves produce organic matter under light", the purpose of putting the leaves in alcohol and heating them over water is ( )

A. Dissolve starch B. Dissolve chloroplasts in leaves

C. Cook the starch D. Dissolve the chlorophyll in the leaves

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"Green plants are the producers of organic matter in the biosphere" PPT courseware 7:

"Green plants are the producers of organic matter in the biosphere" PPT courseware 7 Learning objectives: What conditions are needed for green plants to produce organic matter? What are the main organic substances produced? 1. The purpose of the experiment is to test whether the organic matter produced by green leaves under light is starch.

"Green plants are the producers of organic matter in the biosphere" PPT courseware 5:

"Green plants are the producers of organic matter in the biosphere" PPT courseware 5 Think about it and discuss it. Besides providing a hidden habitat for frogs, what other important role do green plants play in the life of frogs? Indirectly provide a food source. (Because most frogs eat insects...

"Green plants are the producers of organic matter in the biosphere" PPT courseware 4:

"Green plants are the producers of organic matter in the biosphere" PPT courseware 4. From the previous study, we know that biology and the environment are a unified whole, and this unified whole is the ecosystem. Plants, animals, fungi and many microorganisms are divided into ecosystems...

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Update Time: 2024-10-19

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

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