Topic 3 Notes

When Lisa uses a hairdryer, she is using

• thermal energy

• potential energy

• electrical energy

When a person on a bicycle is stopped at the top of a hill, they have

• thermal energy

• potential energy

• electrical energy

Mario draws a model to show particles in water. When the temperature is raised the particles stay the

• they change completely

• same size but are more spread out

• same size but together

When a light shines towards a mirror ______________ the light.

• shines

• reflects

• blocks

For a shadow to form the light must be _________________ by an object

• reflected

• blocked

You can feel __________after you rub an eraser against an object.

• coolness

• heat

• friction

Which is a form of stored energy?

• sound

• fuel

• heat

The path of light waves from their source until they strike an object or pass through different materials is a

• many paths in different directions

• straight line in one direction

When light enters the water, _________________________which causes a straw in a glass to look broken.

• it speeds up and refracts

• it slows down and refracts

Which of these gives off both light energy and heat?

• A fireplace

• a electric light bulb

• a flashlight

• a candle