Thermal Energy-Heat & Materials (Topic 4:Lesson 3)

Front

A foam picnic cooler keeps food cool on a hot day. What is this an example of?

Back

an insulator

Front

What do objects tend to do when they are heated?

Back

expand

Front

Wood, air and wool are all examples of

Back

insulators

Front

When a bike skids to a stop, the tires experience ___________ with the ground.

Back

friction

Front

Conductors are...

Back

materials that conduct heat

Front

Because of ___________, bridge joints are used to allow room for the bridge to expand in the heat.

Back

thermal expansion

Front

When surfaces exert friction on each other, their thermal energy ____________.

Back

increases

Front

Popcorn is an example of _______________.

Back

Thermal expansion

Front

The force of friction causes an object to: heat up, slow down, expand, all of the above

Back

all of the above

Front

When an object cools down it can: expand, contract, grow, disappear

Back

contract