1) which one is not a water resource? a) river b) pond c) tree 2) The human body contain _________ % of water a) 50 b) 60 c) 70 3) __________% of the water on earth is salt water? a) 97 b) 77 c) 87 4) one out of _________ people one earth searches fresh water every day. a) 7 b) 8 c) 6 5) A human only can survive _____________ days without water. a) 4 b) 5 c) 3 6) You can't find catfish in the __________________. a) river b) sea c) lake 7) Water made of two elements. What are they? a) Carbon, Nitrogen b) Hydrogen, Sulphur c) Hydrogen, Oxygen 8) We need to drink at least __________ glasses of water daily. a) 8 b) 7 c) 9 9) ________ % of the earth covered with water. a) 80 b) 90 c) 70 10) only ___________% o the water on earth is fresh water. a) 1 b) 2 c) 3

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