1) Pollution can lead to ....... a) Health b) Sickness c) happiness d) Better world 2) Hydrosphere is ........ a) Wind b) Ecosystem c) Water d) Animals 3) This picture represents ........ a) Geosphere b) Hydrosphere c) Biosphere d) Atmosphere 4) Rivers water is ..... a) Salt water b) Fresh water c) Mixture of fresh water and salt water 5) This picture represents ....... a) Sea b) Beach c) River d) Lake 6) What kind of water in ocean ....... a)  Fresh water b) Salt water 7) What kind of fish does the ocean have ? a) Dolphin b) Sand c) Shark d) Codfish 8) What kind of fish does streams have ? a) Elephint b) Trout c) Insects d) Frogs

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