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Light and Soil - Class 7
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In order for plants to grow, the cells require nutrients in the form of minerals. The minerals come from
Soil
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The topmost fertile layer (Horizon A) is rich in
Humus
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Dentists would like to see the larger image of our teeth. What kind of mirror would you suggest for them?
Concave Mirror
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Any two differences between the clayey soil and sandy soil.
Sandy soil contains larger particles and cannot hold water. Clayey soil contains fine particles and can hold water.
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The rotting dead matter in the soil is called
Humus
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Identify the Mirrors
Concave Mirror-Curved inward and Convex Mirror-Curved outward
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Define Rectilinear Propagation of light
Light always travels in a straight line. This property is called as Rectilinear Propagation of light.
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Which mirror is otherwise called as "converging mirror"?
Concave Mirror
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