Answer the following short questions:
a. Soil is an inseparable part of our life. Justify
b. How soil get polluted? How it can be prevented?
c. What is humus? What role it plays in soil?
d. What is composition of soil? Enlist the climate factors which affect soil profile.
e. Size of soil particles have important influence on property of soil. Classify the soil correlating with size of soil particles.
f. List down the climate factors which affect soil profile.
g. Why erosion of soil is more severe in deserts or bare lands?
Differentiate A, B and C Horizons.
if a soil sample ‘X’ has 20% Water Holding capacity. I have poured water from measuring cylinder having 100 ml water on 50 g of soil sample ‘Y’ till dripping. Water left in cylinder is 80 ml.
i. Calculate percentage of water retained by soil sample ‘Y’.
ii. Which soil sample can be used to grow paddy?
Which type of soil is better for following & why-
a) For making pots
b) For growing plants
c) To reach wells
Unscramble the below Jumble Word
Given below are the links of some of the reference books for class 7 math.
You can use above books for extra knowledge and practicing different questions.
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