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Light travels in
 
straight lines
 
waves
Sound cannot travel in space.
 
True.
 
False.
Shadows are formed when light is blocked by an object
 
True
 
False
Light travels faster than sound
 
True
 
False
What are two sources of natural light?
The sun, fireflies, stars...
Does natural light need electricity?
 
No.
 
Yes.
True or False: Sound travels as molecules bump into each other.
 
True
 
False
True or False: Sound is a form of energy.
 
True
 
False
When you speak, your vocal cords ...
 
vibrate
 
don't move
You hear sounds with your ...
 
ears
 
vocal chords
Sound travels in the shape of ...
 
waves
 
energy
Sound travels out in all ...
 
directions
 
media
Sound is a ...
 
vibration
 
direction