Light ........ off objects and into our eyes so we can see clearly
reflects
When vibration is slow, the sound is ..........
low-pitched
What energy is it?
heat energy
Vibrations of dog's barking is strong, so its sound is ....
loud
When vibration is fast, the sound is ...........
high-pitched
Light can't travel through ...... objects
opaque
The movement of heat energy between objects is called ..........
conduction
Whst energy is it?
sound energy
If The Sun can't travel through objects, these objects leave ......
shadow
Fabric is a .... conductor of heat
poor
What material is it?
Metal
... ... is a source of heat energy
The Sun
What is it?
Wave, vibrations
Light can travel really fast, around ...... kilometers per second
300.000
What energy is it?
Heat energy, light energy
Glass is ........... so light can't travel through it
transperent
