Page 93 - Science Class 07

F. Short answer ques ons.
1. Describe any two natural process of weathering.

2. What do you mean by soil profile? Describe any two horizons.
3. Differen ate between sandy soil and loamy soil.
4. Why alluvial soil is very important?

5. Write the importance of soil.
G. Long answer ques ons.
1. Describe soil with its types.
2. What do you understand by crop rota on? Explain it in your own words.

3. Write the causes of soil erosion and the ways through which we can check it.
4. Explain the texture of soil.

Project ActivityActivityActivity
Project
Project
Project Activity
A. In an outline map of India, mark the regions where alluvial soil, black soil and red soil are
found.

B. Take a small amount of soil from your garden and observe it carefully under a lense. Write
the things and organisms you find in it.

_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________

_____________________________________________________________________________
C. Iden fy and name the following soils.

1. ______________ 2. ______________ 3. ______________ 4. ______________

HO
HO
HOTSTSTS
HOTS
A. Why does topsoil have much more humus than subsoil?
B. What kind of soil is the most suitable for making toys? Why?

C. Why is soil regarded as the most important natural resource?

Science-7 93