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Class 7 Important Questions for Science – Soil

December 15, 2014

Class 7 Important Questions for Science – Soil

NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7.

Question from very important topics are covered by NCERT Exemplar Class 7. You also get idea about the type of questions and method to answer in your Class 7th examination.

Here you can get Class 7 Important Questions Science based on NCERT Text book for Class VII. Science Class 7 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Soil for Class 7 Science subject.

Science Important Questions Class 7 are given below.

Multiple Choice Questions

The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.
- (a) Desert
- (b) Forest
- (c) Open field
- (d) Cricket ground
Availability of water and minerals in the soil for maximum absorption by roots is in the –
- (a) B-horizon
- (b) C-horizon
- (c) A-horizon
- (d) surface of soil
Soil conservation measures are mainly aimed at protecting which of the following?
- (a) Plants
- (b) Top soil
- (c) Sub soil
- (d) Soil organisms
Read the following statements with reference to soil.
(i) Weathering is a very fast process of soil formation.
(ii) Percolation of water is faster in sandy soils.
(iii) Loamy soil contains only sand and clay.
(iv) Top soil contains the maximum amount of humus.
Choose the correct statements from the above.
- (a) (ii) and (iv)
- (b) (i) and (iii)
- (c) (ii) and (iii)
- (d) (i) and (ii)

Very Short Answer Type Questions

Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.
Rock, Clay, Sand, Gravel, Silt
The components of loamy soil are ______, ______ and ______.
Read the following statements and give the appropriate terms for each of them.
- (a) The process of breakdown of rocks by the action of wind, water, sunlight.
- (b) Removal of top soil during heavy rains or strong winds.
- (c) Accumulation of wastes in the soil generated by human activity which alter the features of soil.
- (d) The process of movement of water into deeper layers of soil.
Unscramble the following jumbled words related to soil.

Short Answer Type Questions

Which of the following situations – ‘A’ or ‘B’ – is advantageous for absorption of water and minerals? Why?
Situation ‘A’ : Growth and branching of roots in the C-horizon.
Situation ‘B’ : Growth and branching of roots in A and B Horizons.
How can a farmer convert acidic soil to neutral soil?
Is it a good practice to remove grass and small plants that are growing in an open, unused field? Give reason to support your answer.
A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not dig beyond a depth of 5 feet. Provide a suitable scientific explanation.
Locate the following zones given as boxed items in Figure 9.1 which shows a diagram of soil profile.
Top soil, Subsoil, C-horizon, Bedrock
Rajasthan is a desert state in India. Once while travelling to Rajasthan by train, Boojho observed several streams and rivulets of rain water during the journey but to his surprise he did not see streams of water in the desert region even during rains. Help Boojho find a suitable explanation for this.
Match the animals in Column I with their natural place of dwelling (habitat) in Column II.

Long Answer Type Questions

Continuously water-logged soils are disadvantageous for plant growth. Why?
Why is soil erosion relatively less in dense forests as compared to barren, open fields?
Gardeners gently dig up the soil around the roots of garden herbs (plants) frequently. Give reasons.
In towns and cities, generally, the bore wells have to be dug very deep to get water as compared to bore wells dug in villages. Give suitable reasons.
Several terms related to soil are hidden in the squares given as Figure 9.2. Spot them and make a list.Two examples are given for you.