Approximately how much percentage of Earth's surface is covered with water? (70%, 71%, 72%)
71%
The chemical formula of water is (H2O, H3O, H2C).
H2O
Around what percentage of our body is water? (80%, 50%, 70%)
70%
What percentage of the world's water is salt water? (67%, 97%, 17%)
97%
Which of these contain the most water? ( bones, brain, muscles)
brain
Rainwater is the purest form of water. (True/False)
False
Which weight more? Cold water or hot water?
cold water
Ice sinks in water. (True/False)
False
