"Interesting Food Connections" Biology and Environment PPT Courseware 3

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"Interesting Food Connections" Biology and Environment PPT Courseware 3

"The mantis stalks the cicada, but the oriole follows behind" refers to what biological phenomenon?

Discussion: What do the animals here eat? What kind of food relationship do they have? Everyone uses simple words or arrows to indicate who is eaten by whom.

In conclusion

Such a chain-like food relationship between living things is called a food chain.

concept:

In an ecosystem, the relationship between various organisms due to food relationships is called a food chain.

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

Organisms in the food chain that can produce their own food are called producers

Creatures that directly or indirectly consume food produced by others are called consumers

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

food chain:

1. Use arrows to indicate the relationship between eating and being eaten.

2. The arrow points to the eater

3. The food chain includes at least three types of animals and plants

4. The food chain starts with plants

Thinking: Are the following two food chains correct? Why?

1. The relationship between eating and being eaten must be reasonable

2. The arrow points to the eater

3. The food chain includes at least three types of animals and plants

4. The food chain starts with plants

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

Consequences of disruption to the food chain

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?

Let's calculate

A snake can eat 60 voles per year, and one vole wastes 5kg of grain in a year. According to statistics, humans eat 1,000 tons of snakes every year. If each snake weighs 0.5kg, how many voles are released in one year? How much food was lost?

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For more information about the PPT courseware "Interesting Food Connections between Biology and the Environment", please click the "Interesting Food Connections between Biology and the Environment" ppt tag.

"Interesting Food Connections" Biology and Environment PPT Courseware 4:

"Interesting Food Connections" Biology and Environment PPT Courseware 4 Do you know which other creatures are connected by this kind of food relationship? Food chain: Various organisms are closely connected through the relationship between eating and being eaten. The relationship between these organisms is food. ..

"Interesting Food Connections" Biology and Environment PPT Courseware 2:

"Interesting Food Connections" Biology and Environment PPT Courseware 2 There is generally a relationship between eating and being eaten among organisms in the food chain. This relationship is like a chain, closely connecting some organisms. Biologists put the relationship between organisms Food connections are called food chains. please..

"Interesting Food Connections" Biology and Environment PPT Courseware:

"Interesting Food Connections" Biology and Environment PPT Courseware Review 1. There are no living things in the desert. 2. Cactus cultivation should be watered more often. 3. Penguins are typical creatures living in the Arctic. 4. Camels are typical desert creatures. They can go without drinking for two weeks...

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Update Time: 2024-10-03

This template belongs to science courseware People's Education Press Sixth Grade Science Volume 2 industry PPT template

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