What energy needs to be removed from liquid water to change it to a solid?
A. Heat
B. Light
C. Chemical
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A. Heat
Removing heat causes liquid water to freeze and form ice. Water also exists as a gas or a vapour.
How much time must pass for plant or animal remains to be considered a fossil?
A. 60 years
B. 100,000 years
C. 10,000 years