"Types of Soil" Soil PPT Courseware 3

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"Types of Soil" Soil PPT Courseware 3

What types of soil are classified according to sand content?

Answer: It is divided into three categories: soil with more sand is called sandy soil; soil with more clay is called clay soil; soil with moderate content of sand and clay is called loam.

What are the characteristics of each of the three types of soil?

Answer: Sandy soil has good air permeability, but poor water retention performance. Clay soil has good water retention properties but poor air permeability. Loam soil has good air permeability and water retention properties.

Which soil do you think is more suitable for growing plants?

Which type is better for plant growth? The aeration and water retention properties of the soil must be considered comprehensively.

Design an experiment to illustrate my point

soil properties

sandy soil

It is loose, not easy to stick, has strong ventilation and water permeability, and is prone to drought. Organic matter decomposes quickly and is easily lost.

Clay soil

The texture is sticky and heavy, sticky when wet and hard when dry. It has strong ability to retain water and fertilizer, but poor ventilation and water permeability.

loam soil

Not too loose, not too sticky. It is ventilated and water-permeable, can retain water and fertilizer, and is suitable for farming.

Practice to achieve standards

1. People divide soil into three categories according to the sand content in the soil: soil with more sand is called _____; soil with more clay is called _____; soil with moderate sand and clay content is called _____.

2. The most suitable soil for planting is ( ).

A． Sandy soil B. Clay soil C. Loam

3. The most fertile natural soil is ( ).

A． Brown soil B. Black soil C. Loess D. glacial swamp soil

4. The soil types in the inland northwest areas are mostly ( ).

A． Brown soil B. Glacier soil C. Desert soil D. red soil

5． Why is black soil said to be the most fertile natural soil?

6. Look at what type of soil is shown in the picture, and where are they mainly distributed in my country?

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For more information about the "Types of Soil" PPT courseware, please click the Soil ppt Types of Soil ppt tag.

"Types of Soil" PPT download:

Qingdao edition third grade science volume 2, types of soil PPT download, the first part content: Knowledge exploration Exploration 1: Types of soil What are the differences between the four soils on the table? ① Twist their viscosity with your hands. ②Pinch them with your hands to see if they can be kneaded into a ball. ③..

"Types of Soil" PPT courseware:

Qingdao edition third grade science volume 2, types of soil PPT courseware, the first part of the content: Classification of soil Soil refers to the soil on the ground that can grow plants. What types of soil are there? (1) Sandy soil? (2) Clay soil? (3) Loam? Explore, ask questions, soil...

"Types of Soil" PPT:

Qingdao edition third grade science volume 2, types of soil PPT, the first part of the content: Soil What is soil? Soil is composed of three types of substances: solid, liquid and gas. Solid matter includes soil minerals, organic matter and microorganisms. Liquid substances mainly refer to soil..

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Update Time: 2024-11-17

This template belongs to science courseware Hunan Education Edition Third Grade Science Volume 1 industry PPT template

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