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WorksheetsFreysguys Grade 4 Light and Sound
Total questions: 40
Worksheet time: 22mins
________ is the distance between a point on one wave and a similar point on the next wave.
frequency
wavelength
pitch
___________ is the number of waves that pass a point in a certain amount of time.
Frequency
Pitch
Wavelength
_______ describes how high or low a sound is.
Frequency
Wavelength
Pitch
If you change the frequency, or wavelength, of a sound wave, you change its ______.
loudness
pitch
vibration
compression
Sound cannot travel through __________.
air
metal
water
empty space
____________ occurs when an object takes in a light wave.
Absorption
Refraction
Reflection
_________________ is the bending of light when it passes into a new medium.
Absorption
Reflection
Refraction
A piece of glass that separates white light into its different wavelengths is called a ___________
crystal
mineral
prism
What happens during refraction of light as it passes through a prism?
Light bends and separates into individual colors.
Different colors of light combine into white light.
All the colors of light bend in the same way.
All of the light bounces off the prism.
Why does light bend when it travels through a different medium?
Light changes speed when it passes through a different medium.
Light is reflected when it passes through a different medium.
Light is absorbed when it passes through a different medium.
Light changes to heat when it passes through a different medium.
A guitarist strums two strings of the same thickness on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the strings?
The first string and the second string have the same pitch.
The pitch of the second string depends on the pitch of the first string.
The second string has a higher pitch than the first string.
The first string has a higher pitch than the second string.
Why does a megaphone make it easier to hear sound?
It is a cone, and just like ice cream cones, people get louder around it!
It makes the energy get bigger.
Like a funnel, it focuses the sound waves in a direction so that the sound waves are scattered in fewer directions.
This is false; megaphones do not help us to hear.
We see a red t-shirt because . . .
Red light is absorbed and the other colours are reflected.
Red light is refracted.
Red light is reflected and the other colours are absorbed.
Like stop signs, red means stop, and the red light stops at our eye.
Sound travels faster than light in space only.
True
False
Check all that apply. Light and Sound . . .
both travel in waves, and need a medium to travel through, and both are affected by frequency (the number of times the crest of a wave passes a point).
travel at different speeds, with sound being many times faster
both travel in photons, and need a medium to travel through, and both are affected by frequency (the number of times the crest of a wave passes a point).
both travel in waves, but only sound needs a medium to travel through, and both are affected by frequency (the number of times the crest of a wave passes a point).
