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Q4.

Use the following information to answer the next question.

As compared to the soil particles present in silt and sand, the soil particles present in clay are the smallest in size. The size of the soil particles in silt is between that of the size of soil particles in clay and sand. Sand is granular and the size of its particles is the largest.

Soil samples collected from four different regions were mixed with water in a beaker and were allowed to settle.

Sand particles occupy layer

A :

I

B :

II

C :

III

D :

IV

Time Spent: 24 seconds

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Soil particles will settle according to their respective weights. The lightest soil particles will settle at the top of the beaker, whereas the heaviest soil particles will settle at the bottom. The sand particles present in soil are the largest. Thus, they will settle at the bottom of the beaker.

The correct answer is A.

no , but the correct answer is b which i have ticked be cause the last layer which is shown is called the gravel in hindi (kankad) i am in full confiedence that my answer is correct and merit do all the things fast you ae doing everything very slow i want my answer on 14-2 2013 as on 15 feb my pre- annual exam is there of subject science

and i also want the answers of the questions asked by me in the subject of social studies and when i am seeing anyone another"s answer in that you have given the answer in 2 hrs in just 2 hrs but mine questions it has now became i think 1 week it"s not fair i want the answer quickly and now i am very much angry . just please try to do it quckly

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1. Which soil is used to make pots, toys and statues?

2. What is residual soil?

3. Does soil possess different colours?

4. Give a collective name for different layers of soil.

5. Soil is found almost everywhere‟. Justify the statement.

6. What are the factors which affect the soil?

7. Why are some soils more productive than others?

8. What is percolation of water? How it is different for different types of soil?

9. What will you observe on heating the soil in a test tube? Explain your observation.

10. Why is soil known as the habitat of many living organisms?

11. What factors are used to differentiate various layers of soil?

12. What is silt? It is a component of which type of soil?

13. Which layer in a soil profile is described as most productive and why?

14. How can soil erosion be prevented?

15. What are the causes of soil erosion?

16. How does moisture affect the fertility of the soil?

17. Describe the process of formation of soil.

18. How will you say that the soil is one of the most important natural resources?

19. What is the basis to classify the soil in different types? Describe all the types.

20. Write a short note on the factors that pollute soil. Also give measures of prevention.

21. Why does erosion of soil occur? Give the methods to prevent it.

22. List the factors which help in classification of soil.

23. Why different soils suit different crops? Explain.

24. How does the sizes of different soil particles affect its properties?

25. Describe the different layers in soil profile.

26. Name the soil best suited for the growth of rice, wheat, lentils and cotton. Justify your answer with an account on properties of soil.

27. Soil particles size is an important factor to determine the property of soil. Explain.

28. Which is the best soil for growing plants?

29. Which soil is used to make pots, toys and statues?

30. What is soil?

31. What are the factors which affect the soil?

32. Why are some soils more productive than others?

33. Describe the formation of soil.

34. How will you say that the soil is one of the most important natural resources?

35. What is the basis to classify the soil in different types? Describe all the types.

36. Write a short note on the factors that pollute soil. Also give measures of prevention.

37. Why does erosion of soil occur? Give the methods to prevent it.

38. Why different soils are suited different crops? Explain it.

kindly answer these answers please

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