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Vocabulary Preview

A Choose the correct word for each definition.

electricity coal pollution renewable limited
chemical extra wasteful run out of source

1. renewable : a. easily replaced because there is a large supply of it
2. wasteful : a. spending or using more than is needed
3. coal : n. a black solid substance formed from ground and burned as fuel
4. source : n. the person, place, or point from which something comes
5. limited : a. not very great in amount, number, ability etc.
6. electricity : n. a form of energy that can be used for heating and lighting
7. extra : a. more than what is usual or needed
8. run out of : v. to use all of something and not have any more left
9. pollution : n. the act of polluting water, air, or land with poisonous chemicals
10. chemical : n. a substance produced by a chemical process

B Match each of the vocabulary words with the correct synonym.

Vocabulary Word Synonym

1. alternative • • a. succeed, be effective

2. improve • • b. substitute, choice, option

3. work • • c. try, check, analyze

4. test • • d. vast, immense, enormous

5. giant • • e. enhance, better, upgrade

Unit 3 Electricity 121