Page 24 - Science Course 3 (Book 2)

Mo8-L2: Vocabulary Review

Direction: Explain the relationship for each set of terms on the lines provided. Use complete sentences.

1. product; reactant

2. chemical bond; chemical equation; chemical reaction

3. coef cient; chemical formula

4. law of conservation of mass; Antoine Lavoisier

Mo8-L2: Key Concept Organizer

Direction: On the line before each def nition, write the letter of the term that matches it correctly.
Some terms may be used more than once or not at all.

1. cannot be changed into another substance A. chemical reaction
2. Carbon dioxide is an example. B. physical change
3. Substances stay the same before and after change.
C. substance
4. substance produced by a chemical reaction
D. chemical bonds
5. law shown by a balanced equation
6. f xed arrangement of atoms E. chemical equation
7. H is used for hydrogen. F. element
8. represent compounds G. chemical formulas
9. starting substances in a chemical reaction
H. compound
10. Na is used for sodium in the periodic table.
I. symbol
11. The total mass of reactants equals the total mass of products.
12. description of a reaction using chemical symbols J. reactants
13. process where atoms rearrange to form a new substance K. product
14. Water becomes ice. L. conservation of mass
15. uses chemical symbols and formula
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