1. natural resource
2. Soil profile
3. faster
4. humus
5. clayey soil
6. humus
7. silt particles
8. i-c, ii-d, iii- a, iv-b
9. a
10. Clayey Soil
11. The mixture of rock particles and humus is called soil.
12. A vertical section through different layers of the soil is called soil profile.
13. weathering
14. The soil is formed by the breaking down of rocks by the action of wind, water and sun. This process is called weathering.
15. Polythene has many harmful effects. Since it is non-biodegradable, so it increases infertility of soil. It plays a major role in the blockage of water systems like sewage and water pipes, causing floods during rainfall.
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