Forces and effects

To make an object move you have to ____?

T/f: sounds travel slower in solids than liquids

T/f : people cannot hear ultrasound

Sound travels in a ______line.

______ _______ do not return to their initial shape.

______ is the highest pitch that exists

A ____ occurs when a sound hits a distant obstacle.

T/f : not all objects respond to force the same way.

When we sing we use our _____ _______

Clay is an example of a _______ object

T/f: When an object vibrates it makes big movements very slowly

Sound needs a _____ to travel

When we push or pull something, or pick up an object up from the ground we are using _______(58)

T/f: objects that break do not change their shape.

Volume is measured in ______

When we speak or sing we use our _____ _____

T/f : the sounds made by whales travel long distances because there are few obstacles in its path. los sonidos que emiten las ballenas recorren largas distancias porque hay pocos obstáculos en su camino.

T/f: forces can’t make objects change shape

T/f: forces can break objects

T/f: sounds travel faster in liquids than in gases

Rigid objects ______(58)

T/f: An object at rest can move without a force. (59)

T/f : a loud sound is more intense

The pitch of a sound depends on the _____(6)

______ ______ go back to their initial shape when a force stops acting upon them.

____ is the force that slows down and stops a moving object when it is in contact with another object.