"Ecological Pyramid" PPT courseware

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"Ecological Pyramid" PPT courseware

Read the text aloud and discuss:

1. What is a food chain?

2. What is an ecological pyramid?

3. What are the three trophic levels of the ecological pyramid? Can you draw it?

4. What enlightenment does the ecological pyramid give to mankind?

Text study

Scientists examined the food chain of the biological world and found that it resembled a pyramid, so they called it an ecological pyramid.

The importance of green plants

“Green plants are the energy basis of all living things and are primary producers.”

"Green plants on the earth are collectors of solar energy and suppliers of energy and nutrients to the ecosystem."

"The efficiency of green plants in using solar energy and the scale of their production determine the amount of energy entering the ecosystem, and also determine how many herbivores and carnivores our earth can support, and how many animals the earth can support. people."

Study the sixth natural paragraph

Read and think:

1.The importance of green plants?

2. What would it look like without the green plant ecological pyramid?

Speak freely

As humans at the top of the ecological pyramid, what efforts should we make to maintain ecological balance?

In order to let readers better understand the ecological pyramid, what methods of explanation does the author use in the article?

Draw the key words and sentences in the text that introduce the food chain and ecological pyramid of the biological world, carefully ponder them, understand what explanation methods are used, and try to understand their effects.

read it

Big fish eat small fish, small fish eat shrimps, shrimps eat plankton, plankton eat green algae... There is a food chain in the biological world.

think about it

What explanation method is used in this sentence?

learn a lesson

In order to illustrate the food chain, the author gave an example. This explanation method is called "giving an example".

To illustrate complex, abstract things or concepts with concrete, vivid, and easy-to-understand typical examples

Look for it

Can you find other places in the text where this "example" method of explanation is used?

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"Ecological Pyramid" PPT courseware download:

"Ecological Pyramid" PPT courseware download Part 1: Pre-study check 1. Read the text freely, pay attention to the correct pronunciation of the words, and read through the text. 2. Use your own words to describe what the text contains. Underline relevant sentences as you read. Word Paradise seaweed locust antelope feeding...

"Ecological Pyramid" PPT download:

The first part of "Ecological Pyramid" PPT download content: The new lesson introduces the ecological environment short film Food chain: B species eats A species, C species eats B species, D species eats C species, this is a series of relationships between eating and being eaten. , called a food chain. Grass-fed..

"Ecological Pyramid" PPT:

"Ecological Pyramid" PPT Part One Content: First Reading Perception Word Integration Antelope Meaning: ①antelope; ②refers to antelope horns. Word group: antelope (antelope) (takin) Word identification: listen (listen) (listen) (listen to teach) Sentence creation: On the hillside, a group of antelopes were grazing leisurely. ..

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Update Time: 2024-10-02

This template belongs to Chinese courseware Hunan Education Edition Fifth Grade Chinese Language Volume 1 industry PPT template

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