Page 84 - Science Course 1 (Book 2)

Mo8-L6: Vocabulary Review

Direction: Explain the differences among each set of terms on the lines provided.
Use complete sentences

1. radiation; specif c heat

2. conduction; convection; convection current

3. thermal conductor; thermal insulator

4. thermal expansion; thermal contraction

5. radiation; vacuum

Mo8-L6: Key Concept Organizer

Direction: Circle the term in parentheses that correctly completes each sentence.

The amount of (1.) (thermal energy/mechanical energy) it takes to increase the temperature of 1 kg of
a material by (2.) (1 K/1°C) is called specif c heat. Every material has its own specif c heat. It is (3.) (easy/dif-

f cult) to change the temperature of a material that has a low specif c heat, but (4.) (easy/dif cult) to change
the temperature of a material that has a high specif c heat.

Thermal conductors have a (5.) (higher/lower) specif c heat than thermal insulators. As a result, it

takes (6.) (more/less) thermal energy to increase a thermal conductor’s temperature than it takes to increase
the temperature of a thermal insulator by the same amount. The specif c heat of water is particularly (7.)

(high/low). Therefore, it takes a (8.) (small/large) amount of energy to increase or decrease the temperature
of water. The (9.) (high/low) specif c heat of water has many benef cial effects.

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