Speed
________ travels faster than __________. (Sound / Light)
What type of energy travels faster than sound?
Sound travels in a __________.
Wave
Light behaves like a wave, but it travels in a ________ line, unless it hits something.
Straight line
If an object blocks light, we say that the object is ___________.
opaque
Light is so fast that it could circle the Earth in less than a second. (True/False)
At the speed of light (approximately 300,000 kilometers per second), a beam of light could circle the Earth's equator roughly 7.5 times in just one second.
A high frequency sound, is a _______ pitch sound.
High pitch
If light bounces of something, we say it __________ light.
reflects
If an object allows light through easily and you can see objects through it clearly, the object is called ___________.
transparent
The speed of sound is approximately 761 mph (340.3 m/s). If you travel this fast you are travelling at MACH __.
MACH 1
A low frequency sound is a _____ pitch sound.
low pitch
If light is stopped by something, we say it __________ light.
absorbs
____________ is cool.
Mr. E
When something travels faster than the speed of sound, it creates a loud sound called a ____________.
sonic boom
An echo is created when sound waves....
The sound wave travels to the surface, bounces back, and is then heard by the listener as a delayed repetition of the original sound.
If light bends when it hits a new kind of matter, we say it __________ light.
refracts
A dolphin uses _____________ to find objects underwater using reflected sound.
Echolocation
Sound travels faster in air than in water. (True/False)
False, particles are closer together in water so vibrations travel faster.
A high amplitude sound wave is a _____ sound.
loud sound
If light can travel throuhg something, but not completely, we say that the object is ___________.
translucent
Sound is created from travelling __________ in particles.
Vibrations