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Authoritative PPT Summary
"What's in the Soil" The land where plants live PPT courseware 2
Think - guess
Group Activity
1. Guess: What might be in the soil?
Stones, sand, fine particles, bark, plant leaf fragments, small animals (such as earthworms, etc.), other debris, etc.
2. What method do we use to find these ingredients?
Group activity Explore the composition of soil
Experiment What do we find when we pour soil into water?
1. Stir the soil in the water and then let it stand for a while. What phenomena do we see?
2. How many layers of soil sediments are there? Why is there such an order?
Separated into layers, large particles settled below, plant residues floated on top, etc. (related to severity)
Experiment: Conduct a burning test on the soil to observe what phenomena occur:
Turns black and smells odor. It proves that there are animal and plant residues in the soil.
read
Humus is a black substance produced when animals and plants decay, and is formed by microbial decomposition in the soil. Contains some elements needed for plant growth and development, which can improve soil and increase fertility. It is an essential nutrient element for plant growth.
Summarize:
Soil is a mixture of clay, sand, pebbles, humus, water, air and other substances.
Detection:
1. Soil is a mixture of substances such as ( ), ( ), ( ), ( ), ( ) and ( ).
2. Put the soil into the water and find bubbles coming out, indicating that there is () in the soil. Soil also contains nutrients needed for plant growth ( )
Operation:
Collect and review soil information, jot down interesting content, and make a data card.
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For more information about the PPT courseware "What is in the soil, the land where plants live", please click the What is in the soil ppt, what is the land where plants live ppt tag.
"What's in the Soil" PPT courseware:
Qingdao edition of the second volume of third grade science, what is in the soil PPT courseware, the first part: classroom experiment
Experimental steps:
1. Put small clods of soil into water. What do you see? Explain what is in the soil?
2. Stir the soil and let it sit for a while.
"What's in the Soil" PPT:
Qingdao version of the third grade science volume 2, what is in the soil PPT, the first part of the content: methods to find the components of the soil. What I saw with the naked eye in the soil was that the soil was moist, with unbroken pebbles, grass roots and insects, and a magnifying glass with pebbles. Sand grains and powders of different sizes...
"What's in the Soil" The land where plants live PPT courseware 4:
"What's in the Soil" The Land Where Plants Live PPT Courseware 4 (1) Life in the Soil - Soil Biological Observation Observation Time Observation Location Environmental Characteristics Soil moisture, looseness, temperature, light, plant growth conditions and other environmental factors Soil Biology Earthworms ..