SIE 4 Chapter 6 energy -7 light

Energy is found in all ....

energy cannot be made, lost or

Energy is present in all matter.

Look at the objects bellow.

Choose two objects that give off sound

• burning candle

• hairdryer that is switched on

• television set that is switched on

• kettle with boiling water

Kenny says that energy is present all around us.

Is he correct? Explain.

In which examples is the energy transferred to the surrounding environment as sound? Circle the two correct answers.

• pressing a doorbell

• strumming a guitar

• turning on a lamp

If you hit the drums harder, there is more energy transferred, and sound will be ....

Which objects are sources of light?

Choose more than one answers.

• burning firewood

• trumpet

• the Sun

• kettle

Light travels in _______________ lines.

Explain about a ray diagram?

A metal spoon can reflect light well because it has a ... and smooth surface.