Class 8th Social Science Workbook solution| Important Assignment Questions part -2 | chapter 2 Land soil, water, natural Vegetation and wildlife Resources
Class VIII Chapter - 2
Land, soil, water, natural Vegetation and wildlife Resources part - 2 Workbook solutions
Q. 1. Name the type of soils found in India.
Ans. In India six types of soils are found they are :- Alluvial soil, Black soil, Red and Yellow soils, Laterite soil, Desert soil and mountain soil.
Q. 2. Which factors cause degradation of soils?
Ans. Soils degradation occurs due to both human and natural factors.
Q. 3 . What soil conservation?
Ans. Protection of soil by mulching, terrace farming, contour ploughing is called as soil conservation.
Q. 4. Mention at least five methods that can be adopted to conserve soil.
Ans. Methods of soil conservation are:-
1. Afforestation
2. Contour ploughing
3. Terrace farming
4. Crop rotation
5. Construction of shelter belts.
Q. 5. Explain the two methods adopted for conservation of slopes on Hillslopes.
Ans. 1. Terrace farming
2. Intercropping
Q. 6. Which methods of soil conservation is adopted when crops are grown in alternate rows and at different times??
Ans. Intercropping is adopted
Q. 7. Why is the earth is called the 'water Planet'?
Ans. Earth is called 'water Planet ' because Three-fourth's of earth's surface is covered with water.
Q. 8. Give a reason why ocean water is not fit for human consumption.
Ans. The ocean water is saline so it's not fit for human consumption.
Q. 9.Why can't water in Ice sheets and glaciers can't be used?
Ans. Water in ice sheets and glaciers can't be used because their locations are inaccessible.
Q. 10. Name the source of fresh water on the earth.
Ans. The sources of fresh water on the earth surface are:-
a) water in form of rivers, streams and
b) Ground water.
Q. 11. What are the processes involved in the 'Water Cycle'?
Ans. The process of ' water cycle' involves evaluation, precipitation and run-off to the water bodies.
Q. 12. How much of water wasted from a dripping tap in a year?
Ans. 1200 litres of water wasted yearly from a dripping tap.
Q. 13. What are the numerous ways in which human use water?
Ans. The numerous ways are:
a. Drinking
b. Agriculture
c. Industries
d. Generating electricity
e. Other usages to meet day to day needs
Q. 14. List the major factors that lead to shortage of fresh water.
Ans. a. Increasing population
b. Rising demand for food and cash crops
c. Increasing urbanisation and
d. Rising the standard of living are some of the factors leads to shortage of fresh water.
15. Name at least six regions in the world that suffer from scarcity of water.
Ans. Africa
West Asia
South Asia
Part of Western USA
North-west Mexico
Part of South America and entire Australia facing shortage in fresh water supply.
Q. 16. List the major factors that are responsible the pollution of water.
Ans. Discharge of untreated or partially treated sewage, agricultural chemicals and industrial effluents in water bodies are some of the factors responsible for water pollution.
Q. 17. The River Yamuna is getting polluted due to three main sources. Name them.
Ans. River Yamuna is getting polluted due to sewage, industrial effluents and garbage.
Q. 18. How can water pollution be controlled?
Ans. Water pollution can be controlled by threating waste effluents suitably before releasing them in water bodies.