Page 263 - Science Course 3 (Book 1)

Mo7-L3: Lesson Review Quiz (Matching)

Direction: On the line before each definition, write the letter of the term that matches it correctly. Each
term is used only once
1. chemical reaction that absorbs thermal energy A. catalyst
2. chemical reaction that releases thermal energy B. endothermic

3. substance that lowers the activation energy of a reaction C. inhibitor
4. substance that slows or stops a chemical reaction D. exothermic
5. how quickly a chemical reaction occurs E. reaction rate

Mo7-L3: Lesson Review Quiz (Multiple Choice)

Direction: On the line before each question or statement, write the letter of the correct answer

6. In a reaction, activation energy begins the
A. breaking of bonds in the reactants.
B. formation of bonds in the products.
C. formation of bonds in the reactants.

7. What effect does increasing the temperature have on a reaction?
A. It releases energy.
B. It becomes endothermic.
C. It speeds up the reaction.

8. Which activity will NOT cause an increase in reaction rate?
A. adding a catalyst
B. adding an inhibitor
C. increasing the surface area
D. increasing the temperature

9. Activation energy is the amount of energy required to
A. start a chemical reaction.
B. speed up a chemical reaction.
C. make an exothermic reaction.
D. make an endothermic reaction.

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