Page 271 - Science Course 3 (Book 1)

Mo7-L4: Lesson Review Quiz (Multiple Choice)

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

1. Which situation is proof that a chemical change occurred?
A. change in color
B. appearance of bubbles
C. formation of a new substance

2. An increase in the temperature of the reactants would cause a chemical reaction to
A. explode.
B. speed up.
C. slow down.

3. Which equation contains 3 different elements?
A. Pb + S > PbS
B. Fe + 3O > Fe O 3
2
2
C. Ca + CO > CaCO 3
3

Mo7-L4: Lesson Review Quiz (Matching)

Direction: On the line before each definition, write the letter of the term that matches it correctly.
Not all terms are used.

4. characteristic of matter that can be observed as it changes to a A. chemical formula
different type of matter
B. chemical change
5. results in the formation of new substances C. chemical equation

6. statement that describes a reaction D. chemical property

Short Answer: Respond to each statement on the lines provided.

7. Explain why chemical equations must be balanced.

8. List three signs that indicate a chemical change might have occurred.

9. Identify the evidence you would need to prove that a chemical reaction has occurred.

10. Relate the concentration of the reactants in a chemical reaction to the rate at which the reaction occurs.

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