If you put a paper in front of a speaker and turn up the volume the paper will
move
stop
The ability to do work is
Energy
Exercise
true or false : we need energy to do work .
false
true
When we mow the lawn we are doing
play
work
The push or pul that can choose the motion of the object is called
direction
force
The movement of air that causes us to hear things is called a
vibration
very fun
Energy that allows us to see is
light energy
sound energy
How does heat energy affect a marshmallow ?
it melts
it freezes
Energy that makes things warmer is
sound energy
heat energy