In this page we have Soil worksheet for Class 7 Science . Hope you like them and do not forget to like , social share
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Question 1
a. Polythene bags &___________________ pollute the soil.
b. _______________ horizon is made up of small lumps of rocks with cracks & crevices.
c. _______________ in a soil helps plant roots to breathe.
d. _____________ soil has maximum percolation rate.
e. _______________ soil has maximum water holding capacity.
f. _____________ soil is deposited by fast-flowing rivers.
g. ____________ soil have smallest soil particles.
h. _______________ is mixed with clayey soil to improve its texture & fertility.
i. Percolation rate of water in soil is expressed as ____________________________
j. Use of pesticide should be ___________________ to reduce soil pollution. Answer
Fertilizers
C
Air pocket
Sandy
Clayey
Silt
Clay
Humus
mL/min
minimized
Question 2
(a)___________________ make soil fertile and provide nutrients to the plants.
(b)___________________are flat and transparent.
(c)Soil that has the greatest proportion of large coarse particles is called ___________________.
(d)The spaces between soil particle are known as ___________________.
(e)___________________ is also called topsoil.
(f)Below the horizon C is the layer of ___________________.
(g)___________________ soil is the best soil for plant growth.
(h)___________________ is one of the ways to prevent soil pollution.
(i)Xerophytic plants survive in ___________________.
(j)Soil is made up of pebbles, sand, silt,___________________.
(k)Breaking down of rocks by the action of wind, water and climate is called ___________________.
(l)___________________ gets waterlogged easily.
(m)Horizon A contains good amount of___________________.
(n)Soil can be conserved by growing cover crops and ___________________.
(o) Paddy grows well in ___________________. Answer
Question 4
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?
Question 5
Differentiate A, B and C Horizons.
Question 6
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? Answer
40%
Y
Question 7
Which type of soil is better for following & why-
(a) For making pots
(b) For growing plants
(c) To reach wells Answer
