Q34. How earthquakes are measured?
Q35. How a delta is formed?
Q36. Sea caves are turned into stacks. Give reason.
Q37. Explain the work of ice.
Q38. Why do buildings collapse due to earthquakes?
Q39. Write a short note on earthquake preparedness.
Q40. Write a short note on work of wind.
Q41. Give an account of the work of sea waves.
Q42. Explain the work of a river.