In each drop-down menu. What types of energy are involved in a chemical reaction?
is the energy required for a chemical reaction to take place, and
is the energy associated with
every substance.
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What is impossible to do with a hypothesis

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Which three statements represent the benefits of performing experiments using computer simulations?