"The Choice of Earthworms" Biology and Environment PPT Courseware 2

Description

"The Choice of Earthworms" Biology and Environment PPT Courseware 2

Suggested experimental steps

1. Paint the inner wall of the rectangular box black and cut off part of the lid at one end.

2. Put it on both sides of the bottom of the box? , to protect the earthworm and facilitate its crawling.

3. Place 10 earthworms in the middle of the box and close the lid.

After 4.5 minutes, open the lid and observe and record.

5. Repeat the experiment 3 more times.

Suggested experimental steps

1. Spread the same soil on both ends of the other box, but one side is dry and the other is moist (note that the two types of soil in the middle should not be too separated to facilitate the selection of earthworms).

2. Place 10 earthworms in the middle of the box and close the lid.

After 3.5 minutes, open the lid and observe and record.

4. Repeat the experiment 3 more times.

Experimental conclusion: Earthworms like moist environments.

Earthworms are cold-blooded animals that live in dark, humid, and organic-rich environments. The optimal temperature is 15°C-25°C. The soil moisture content generally survives in an environment with a soil moisture content of more than 60%.

Expand:

When the environment is not suitable for animals to survive, they will choose a suitable environment to live in, otherwise they will have difficulty surviving. Can anyone tell me some examples of related animals and the environment?

Like earthworms, various animals like to live in certain environments, and different animals have different needs for the environment.

When the environment is not suitable for animals to survive, they will choose a suitable environment to live in again.

Class exercises

Multiple choice questions.

⑴ Earthworms live in the soil, so it can be speculated that they are adapted to ( )

A. Dark environment B. Dry environment

⑵ Different animals have ()

A. Same needs B. Different needs

⑶The body color of grasshoppers living on the grass is often ().

A. Gray B. Green C. Yellow D. Brown

⑷Fish must live in water. If they leave the water, they will die. This shows that bio()

A. Can affect the environment B. Can change the environment C. Depend on the environment

Tell us what kind of environment each of these animals is adapted to?

Swallow - likes to live in a warm environment.

Tiger - deep in the mountains and old forests.

Whale - in the sea.

Goose——Water

Snow Wolf - Ice and Snow

Penguin - the southern level where the temperature is very low

Anthill - dry loose soil

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For more information about the PPT courseware "The Selection of Earthworms in Biology and Environment", please click the Selection of Earthworms ppt ppt tab in Biology and Environment.

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Update Time: 2024-09-16

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

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