"Green plants are the producers of organic matter in the biosphere" PPT courseware 3

Description

"Green plants are the producers of organic matter in the biosphere" PPT courseware 3

1. Green leaves produce organic matter under light

Purpose requirements

1. Check whether the organic matter produced by green leaves under light is starch.

2. Explore whether light is an indispensable condition for green leaves to produce organic matter.

Materials and tools

Potted geranium, black paper, transparent tape, alcohol, iodine solution, large beaker, small beaker, petri dish, tripod, asbestos mesh, tweezers, dropper, matches, clean water

Why should geraniums be kept in the dark for 1 day and night?

Answer: This is done to allow the geranium to transport and consume all the original starch in the leaves, to show that the color change in the subsequent experiment is not caused by the starch stored in the leaves before the experiment.

Why cover part of the leaves with black paper?

Answer: It is for a controlled experiment to see if starch can be produced in both parts with and without light.

Experiment summary

1. Starch is a product of photosynthesis.

2. Light is an indispensable condition for green plants to produce organic matter.

3. The definition of photosynthesis.

4. Chloroplasts are not only the "workshop" for producing organic matter, but also the "energy converter" that converts light energy into chemical energy.

2. Organic matter is used to build plants

Composition of plants: water, inorganic salts and organic matter

1. Used to construct plant bodies;

2. Provide energy for the life activities of cells.

The organic matter produced by green plants nourishes other organisms in the biosphere

Green plants are producers in the biosphere. The organic matter they produce nourishes other organisms in the biosphere through food chains and food webs.

Animal food comes from green plants

Herbivores: feed directly on plants.

Carnivores: feed indirectly on plants, and their food comes directly from various animals.

Omnivore: Feeds directly or indirectly on plants.

Class summary

1. Green leaves produce organic matter under light;

2. Organic matter is used to build plants;

3. The organic matter produced by green plants nourishes other organisms in the biosphere.

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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 6:

"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, the structures that plant cells have but animal cells do not are: _________, _________, _________, among which _________ is photosynthesis. ..

"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...

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Update Time: 2024-08-31

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

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