A black 'hole' in the eye that lets light in is called....
True or False: Light is a type of energy.
True or False: The sound of a jet taking off is at or above the human pain threshold level for sound?
This was used to tell time before watches were invented....
Loud sounds become dangerous at which exact decibel level?
Do sound waves of low-pitched sounds have a high or low frequency?
True or False: When light reflects off a mirror, it travels back on the same path it came.
If a sound is shrill and piercing, like a whistle, is it low-pitched or high-pitched?
Objects that do not let any light through are....
What is the organ of hearing?
What is another word for echolocation?
Objects that let all the light through are....
True or False: White light can be split up into the colours of the rainbow.
Would a sound with rapid vibrations be low-pitched or high-pitched?
When we speak, what do our vocal cords do?
When sunlight passes through water droplets in the air, you might get this to form....
What is the best way to protect your ears if you must attend a loud concert?
Another word for the bending of light rays is....
How does sound travel?
What do whales, dolphins and bats use to find their way around?
What scientific unit measures the volume of sound?
In one word, what is sound created by?
A transparent cover that protects the eye is called....
If a sound is deep and rumbling, is it low-pitched or high-pitched?
What word refers to sounds so low that humans cannot hear them?