A reaction in which energy is released is a(n)

Plants absorb and store some of the energy in sunlight through a series of reactions called

When a chemical bond is broken,

Endothermic reactions always

Which is not evidence of chemical reactions?

The splitting of water molecules into hydrogen and oxygen molecules is an example of

Combustion reactions

Which of the following will increase the rate of a reaction?

What does a catalyst do in a chemical reaction?

A chemical equation must

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