2. When a substance gains heat it will become warmer.
3. When a substance loses heat it will become colder.
4. Temperature is a measurement of how hot or cold a thing is.
5. A thermometer is used to measure temperature.
6. The metric unit for temperature is the degrees Celsius.
7. The temperature of an object or material increases as it gains heat and decreases when it loses heat.
8. Matter expands when heated and contracts when cooled.