Review: Heat, Sound, and Electricity

Rubbing your hands together can produce heat.

• True

• False

The Sun is an example of a source of heat.

• True

• False

Look at the picture carefully.

The heat from the campfire does NOT change the color of the marshmallow.

• True

• False

Heat can change an object’s shape, size, and texture.

• True

• False

All objects need batteries for them to work.

• True

• False

A flashlight and a wall clock must be plugged into an electric outlet.

• True

• False

An advantage of using batteries is that they can be stored until you need them.

• True

• False

Sound is important because it helps us communicate our feelings to others.

• True

• False

A whisper is an example of a loud sound.

• True

• False

Unplugging devices when not in use can save electricity at home.

• True

• False