Water Cycle Quiz. How much of the earth's water is ocean?. A) 50% B) 30% C) 75% D) 90%. What atoms make up a water molecule? . A) ABC B) CO2 C) Ca D) H20. How long can a human live without…. Food? One Whole Month. Water? Only One Week!!!. Water freezes at…. A) 0 o F
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