Grade 11 · Science · Physics

11th grade Wave speed, frequency and wavelength worksheet

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Wave speed, frequency and wavelength

Grade 11 Science Worksheet

NameDate

Circle the best answer, or write your answer on the line.

Sound travels at 343.3 m/s in air at 20 °C. What is the wavelength of a 440 Hz note, to the nearest hundredth, Ari?
Sound travels at 343.3 m/s in air at 20 °C. What is the wavelength of a 256 Hz note, to the nearest hundredth, Bo?
Sound travels at 343.3 m/s in air at 20 °C. What is the wavelength of a 1000 Hz note, to the nearest hundredth, Esme?
4.
Using the table, what happens to the speed of sound in air as the air warms from 0 °C to 20 °C, Kira?
- It stays the same
- It falls by about 12 m/s
- It rises by about 12 m/s
5.
Using the table, about how many times as fast as sound in 20 °C air is light, Luz?
Use the picture in question 4.
- About 87 million times
- About 8730 times
- About 873,000 times
6.
A 440 Hz sound passes from air into water. What happens to its frequency, Milo?
- It falls
- It stays 440 Hz
- It rises, since sound is faster in water
7.
Sound moves at 343.3 m/s in air and 1481 m/s in water, both at 20 °C. What happens to a 440 Hz sound's wavelength as it enters water, Noah?
- It shrinks
- It grows from about 0.78 m to about 3.37 m
- It stays the same
8.
A fireworks flash is seen 3 s before its bang is heard. Using 343.3 m/s for sound, about how far away is it, Ren?
- About 1030 m
- About 343 m
- About 114 m
9.
Why is a fireworks flash seen before its bang is heard, Tala?
- Light is far faster than sound
- The flash happens first
- Sound waits for the light to pass
10.
A tone has a period of 0.004 s. What is its frequency, Zee?
- 0.004 Hz
- 250 Hz
- 25 Hz

Wave speed, frequency and wavelength. Every version has 10 questions, and the answer key prints on the second page.

I can use v = fλ and T = 1 ÷ f, reading λ from a ruler and f from a clock.
I can find the wavelength of sound (343.3 m/s in 20 °C air) and of light (c = 299,792,458 m/s, NIST), and compare speeds from a sourced table.
I can explain that the medium sets the speed and the source sets the frequency. Shaking a rope faster shortens the waves without speeding them up, and a wave entering a new medium keeps its frequency while its speed and wavelength change.
I can use flash-and-bang delays, ripple-tank data, and the same speed c for all electromagnetic waves.

Standard: HS-PS4-1

frequency (f): Waves passing each second, in hertz (Hz)

period (T): The time for one wave: T = 1 ÷ f

wavelength (λ): The distance from one crest to the next

wave speed (v): How fast the wave travels: v = fλ

medium: The material a wave travels through; it sets the speed

Your child divided. Wave speed is frequency × wavelength: the waves made each second times the length of each.

Your child thought shaking faster makes the wave faster. The medium sets the speed; shaking faster makes shorter waves.

Your child multiplied. Wavelength is speed ÷ frequency.

What is the most common mistake with wave speed, frequency and wavelength?

Your child divided. Wave speed is frequency × wavelength: the waves made each second times the length of each.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

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