Soil Erosion And Conservation Important Question Answer - Class 5 Science | Quick Revision Study Guide

Q1: What is the topmost layer of the Earth called?
Ans: Soil

Q2: Name three factors responsible for the formation of soil.
Ans: Sun, wind and water

Q3: What is the process called when big rocks are broken down into smaller pieces by natural forces?
Ans: Weathering

Q4: What is humus, and where is it found in the soil?
Ans: Humus consists of the remains of dead plants and animals and is found in the topsoil.

Q5: How many layers are there in a soil profile?
Ans: Three

Q6: Which layer of soil contains the most humus?
Ans: Topsoil

Q7: What is the term for the process of wearing off or carrying away of topsoil by wind or water?
Ans: Soil erosion

Q8: What can cause soil erosion when it rains?
Ans: Flowing rainwater

Q9: Name a place where wind can blow away dry topsoil.
Ans: Deserts

Q10: How have human activities like deforestation affected soil erosion?
Ans: Increased soil erosion

Q11: What removes plants from the soil and results in soil erosion?
Ans: Overgrazing by cattle

Q12: What is the term for protecting soil from erosion?
Ans: Soil conservation

Q13: How do trees and plants help in soil conservation?
Ans: They bind the soil with their roots.

Q14: In hilly areas, how is farming done to reduce soil erosion?
Ans: By cutting steps into the slopes

Q15: What prevents soil erosion along riverbanks and also prevents flooding?
Ans: Embankments