| Category | Format | Size |
|---|---|---|
| Fourth-grade science volume 2 of the E-education edition | pptx | 6 MB |
"Understanding Soil" PPT courseware
Description
"Understanding Soil" PPT courseware
learning target
1. Do you know what types of soil there are?
2. Do you know what the composition of soil is?
3. Do you know how to protect the soil?
Experiment 1: Is there air in the soil?
Experiment 2: Put a piece of soil into a test tube and burn it. What will happen?
Experiment 3: Explained: The soil contains humus
What are the sources and functions of humus in soil?
Source: biological excreta and dead organisms.
Function: Provide food for small animals in the soil, provide nutrients for plants, and enhance soil fertility.
summary
Research results: The non-living substances contained in soil include
(1) Air
(2) Water
(3)Humus
(4) Clay, sand, and stones
Let’s talk about it: How should we humans protect the soil on which all living things depend?
Tips on protecting soil
Apply more bio-organic fertilizers
Reduce the use of chemical fertilizers and prevent soil compaction,
Reduce white pollution and use less plastic bags.
Keywords: Understanding soil teaching courseware, download the science PPT courseware for the second volume of the fourth grade in the E-education edition, download the science slide courseware for the fourth grade, download the PPT courseware for understanding the soil, .PPT format;
For more information about the "Understanding Soil" PPT courseware, please click the "Understanding Soil ppt" tab.
"Understanding Soil" PPT Courseware 3:
"Understanding Soil" PPT Courseware 3 Experimental Phenomenon Clay soil can be rolled into strips. Experimental summary: The soil has poor cohesiveness, which means that the voids are large, so it is relatively loose, water can flow out easily, and the aeration performance is good but the fertilizer retention performance is poor. The soil is very sticky, which means there are small voids and water retention..
"Understanding Soil" PPT Courseware 2:
"Understanding Soil" PPT Courseware 2 Soil can be seen everywhere in our daily life. Please talk about your understanding of soil based on your own life experience 1. How soil is formed 2. What are the common types of soil 3. Soil What's in it 4. What's in the soil...
File Info
Update Time: 2024-07-22
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