"Composition of Soil" PPT courseware

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"Composition of Soil" PPT courseware

Part One Contents: Living and Nonliving Materials in Soil

1. Life in the soil

think

In addition to various plants, are there other organisms in the soil?

2. Non-living substances in soil:

Activity report:

Phenomenon: The amount of water added to the soil is greater than the amount of water added to the iron block

Conclusion: Soil contains air

Explanation: The soil is loose and porous, allowing air to enter

discuss:

1. In the experiment, why do the volumes of soil and iron have to be the same? The shape or volume of the two large beakers used to hold soil and iron must be the same. What is the purpose of this?

2. Why are the amounts of water added to the same volume of iron and soil different?

3. Given a container, an appropriate amount of water, and a large enough measuring cylinder, how do you measure the approximate volume fraction of air in the soil to the volume of the soil?

Soil composition PPT, part 2 content: practice

1. Soil organisms refer to ______ _____ and _______ living in the soil. Most of ______ are tiny and can only be observed with the help of ______ and a microscope.

2. In the experiment of measuring the air volume fraction in soil, the experimental equipment and items used include ____, _____, _____, dropper, and soil.

3. If in the experiment of question 2, after injecting water into the soil iron block and reading from above, the measured volume fraction of air in the soil ( )

A. Too big B. Too small

C. Neither too large nor too small D. Unsure

4. Which of the following groups of organisms are active in soil ( )

(A) Voles and bats (B) Earthworms and beetles

(C) Dragonfly and starfish (D) Paramecium and E. coli

5. What do you think the environment earthworms generally live in?

Moist, loose, humus-rich soil

6. Compare the soil in different environments such as fields, forests, and campuses. Where should the soil contain more organisms? Why?

There are more organisms in soil with dense plants. The reason is that the more humus in the soil, the more fertile the soil and the more vibrant the organisms.

Keywords: Zhejiang Education Edition eighth grade science PPT courseware for the second volume free download, soil composition PPT download, .PPT format;

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"Composition of Soil" PPT:

"Composition of Soil" PPT Part One: Soil Biology Activities 1. Select a soil sample 50cm long, 50cm wide and 30cm thick in the soil where flowers, agricultural and forestry crops grow. 2. Use a small shovel to slowly dig out the soil in the sample and observe carefully..

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Update Time: 2024-11-25

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 2 industry PPT template

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