question_answer43) Total earth's surface covered by water is (a) 75% (b) 60% (c) 85% (d) 50%
View Answer play_arrowquestion_answer53) Rivers from Land, add minerals to sea water. Discuss how?
View Answer play_arrowquestion_answer54) How can we prevent the loss of top soil?
View Answer play_arrowquestion_answer55) How is the life of organisms living in water affected when water gets polluted?
View Answer play_arrowquestion_answer56) During summer, if you go near the lake, you feel relief from the heat, why?
View Answer play_arrowquestion_answer63) Why do people love to fly kites near the seashore?
View Answer play_arrowquestion_answer64) Why does Mathura refinery pose problems to the Taj Mahal?
View Answer play_arrowquestion_answer67) There is mass mortality of fishes in a pond. What may be the reasons?
View Answer play_arrowquestion_answer69) 'Soil is formed by water.' If you agree to this statement then give reasons.
View Answer play_arrowquestion_answer70) Fertile soil has lots of humus, why?
View Answer play_arrowquestion_answer71) Why step farming is common in hills?
View Answer play_arrowquestion_answer72) Why are root nodules useful for the plants?
View Answer play_arrowquestion_answer73) How do fossil fuels cause air pollution?
View Answer play_arrowquestion_answer76) Justify 'Dust is a Pollutant'.
View Answer play_arrowquestion_answer77) Explain the role of the sun in the formation of soil.
View Answer play_arrowquestion_answer78) Carbon dioxide is necessary for plants. Why do we consider it as a pollutant?
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