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Tom is in a bad mood because he has just lost his cell phone,but he decides to attend his friend's party anyhow.At the party,people are laughing and having a good time,so Tom immediately cheers up and joins the fun.Tom's emotional change is the result of
Activation Energy
The minimum energy required to start a chemical reaction.
Enzyme
Biological molecules that act as catalysts to speed up chemical reactions in living organisms.
Graph
A diagram showing the relation between variable quantities, typically of two variables measured along a pair of lines at right angles.
Reactants
Materials that exist before a chemical reaction starts and are used up to create end products during the reaction.
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