Q1. Fill in the blanks.
i. Three-fourth’s of the earth’s surface is covered with___________.
ii. Plains and river valleys offer suitable land for ________________.
iii. Community lands are also called _____________________________.
iv. _____________and ______________are the major threats to soil as a resource.
v. Fresh water accounts for only about ________per cent.
vi. ___________determines colour, texture, chemical properties mineral, content, permeability of the soil.
vii. _____________and ___________ influence rate of weathering and humus.
viii. A dripping tap wastes _________ litres in a year.
i. Countries located in climatic zones most susceptible to droughts face great problems of water scarcity. ________
ii. Plains and river valleys are the thinly populated areas of the world. _________
iii. Human factors such as population and technology are also important determinants of land use pattern. ________
iv. Forests are broadly classified as evergreen and deciduous. _________
v. Water is a vital renewable natural resource. _________
vi. It takes hundreds of years to make just one centimeter of soil. ______
Q3. Which country has the highest percentage of land under forest?
Q4. Which country has the highest percentage of land under cropland?
Q5. Which country has the highest percentage of land under pasture?
Q6. What are the major threats to soil as a resource?
Q7. What method of soil conservation is used in coastal and dry regions?
Q8. What percent of fresh water is fit for human use?
Q9. What make the soil fertile?
Q10. What affect the rate of humus formation?
Q11. Why is ocean water not fit for human consumption?
Q12. What is soil?
Q13. Which are the two main climatic factors responsible for soil formation?
Q14. Which method is most appropriate to check soil erosion on steep slopes?
Q15. What do you mean by shelter belt?
Q16. How are forest classified on the basis of latitude?
Q17. What are the major types of vegetation in the world?
Q18. How are vultures important to the environment?
Q19. What percentage of Earth is covered by land?