"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4

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Fifth Grade Science Volume 1, Textbook Edition	pptx	6 MB

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4

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Upload Time: 2024-09-25

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Description

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4

Knowledge points:

This link-like food relationship between organisms is called a food chain.

The same plant will be eaten by different animals, and the same animal can eat different foods. The complex food relationship between organisms forms a network structure called a food web.

The food chain usually starts with green plants and ends with ferocious animals.

Make an ecological bottle

Steps: Eco Bottle

Discussion: What will happen to the organisms if the number of water plants in the ecological bottle is doubled?

What will happen to the organisms if there are twice as many fish in the ecological bottle?

Conclusion: Organisms must coexist harmoniously within a certain range. If the ecological balance is destroyed, the survival of organisms will be threatened.

What would happen if one link in the food chain changed?

(1) What would happen if there were fewer eagles?

(2) What will happen if there are fewer rabbits?

(3) What will happen if there is less grass?

Fact: Blue sheep need to be reduced...

What causes sandstorms

What causes sandstorms?

What should we do?

let's move!

Keywords: biology and environment teaching courseware, maintenance of ecological balance teaching courseware, textbook fifth grade science PPT courseware download, fifth grade science slide courseware download, biology and environment PPT courseware download, maintenance of ecological balance PPT courseware download, .PPT format ;

For more information about the "Biology and Environment Maintaining Ecological Balance" PPT courseware, please click the "Biology and Environment ppt Maintaining Ecological Balance" ppt tag.

"Maintaining Ecological Balance" Biology and Environment PPT download:

"Maintaining Ecological Balance" Biology and Environment PPT Download Part One Content: Collaborative exploration Taking eagles, rabbits, and grass as examples to explore the ecological balance of the grassland and the food relationship between the three. Imagine: What would happen if there were fewer eagles? ? If there are fewer rabbits,...

"Maintaining Ecological Balance" Biology and Environment PPT:

"Maintaining Ecological Balance" Biology and Environment PPT Part One: Eagles, Rabbits, and Grasses If we go to the grassland, we will find that eagles, rabbits, and grasses that rabbits like to eat live there. Let's draw the food chain between the hawk, rabbit and grass. Grass Rabbit Eagle If Eagle..

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 3:

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 3 Ecological Community and Its Ecological Balance The organisms in a certain area in nature form a balanced and harmonious whole, called a biological community. If one part of a biological community is destroyed, the entire ecosystem will be out of balance...

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Update Time: 2024-09-25

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"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4