"Food Chains and Food Webs" Biology and Environment PPT Download

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"Food Chains and Food Webs" Biology and Environment PPT Download

Part 1: Who is eaten by whom?

Food is one of the most important needs for animals to survive. Tell me, what kind of creatures might be in a cluster of flowers?

We found the following creatures in a cluster of flowers. Let’s discuss them:

What do the little animals here eat?

What kind of food relationship do they have?

rose→aphid→ladybug→bird

Grass → aphid → ladybug → bird

Fallen leaves→earthworms→birds

The organisms in the food chain that can produce their own food are called producers, and the organisms that directly or indirectly consume food produced by others are called consumers.

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

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

Food chain and food web PPT, part 2: Food web in the field

There are many creatures in the fields, and there are complex food relationships among these creatures. Looking for it, what food relationships can we find among them? Try using arrows to show the food relationships between them.

Tip: If there is already an arrow connecting two organisms, no arrows will be drawn when drawing the second food chain.

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

If the abundance of one organism in a food web changes, what impact will it have on other organisms?

In the 1950s, there was a campaign to eliminate sparrows as one of the four pests in rural my country. Later, people discovered that in the years after the sparrows were hunted in large numbers, serious insect pests occurred, which greatly reduced food production. The farmer uncle doesn't understand why? Who can explain to the farmer uncle what is going on?

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For more information about the "Biology and Environment Food Chain and Food Web" PPT courseware, please click the "Biology and Environment ppt Food Chain and Food Web ppt" tab.

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Update Time: 2024-11-22

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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