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Grade 8 Wave Speed, Frequency & Wavelength Worksheet with Answers

Grade 8 (US) · Year 9 (UK) · Class 8 (India) · Science

Unit 4: WavesWave PropertiesNGSS MS-PS4-1

Using v = f × λ to find wave speed, frequency and wavelength. This free middle school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Wave Speed, Frequency & Wavelength

Grade 8 · Science

Score___ / 16

Name

Class

Date

Learning goal: Wave Properties · NGSS MS-PS4-1

Directions: This worksheet has 2 parts. Read the instructions at the start of each part.

Example

A wave has a frequency of 50 Hz and a wavelength of 6 m. What is its speed? (v = fλ)

Answer: 300 m/s

Part A

Label the diagram. Use the words in the box.

Word bank

amplitudewavelengthcresttrough
1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Answer each question. Use full sentences where you can.

  1. 5

    A wave travels at 450 m/s with a wavelength of 10 m. What is its frequency?

    λ = 10 mf = ?v = 450 m/sv = f × λ
  2. 6

    A wave travels at 57 m/s with a frequency of 19 Hz. What is its wavelength?

    λ = ?f = 19 Hzv = 57 m/sv = f × λ
  3. 7

    A wave has a frequency of 45 Hz and a wavelength of 14 m. What is its speed? (v = fλ)

    λ = 14 mf = 45 Hzv = ?v = f × λ
  4. 8

    A wave has a frequency of 10 Hz and a wavelength of 2 m. What is its speed? (v = fλ)

    λ = 2 mf = 10 Hzv = ?v = f × λ
  5. 9

    A wave travels at 74 m/s with a frequency of 37 Hz. What is its wavelength?

    λ = ?f = 37 Hzv = 74 m/sv = f × λ
  6. 10

    A wave travels at 282 m/s with a wavelength of 6 m. What is its frequency?

    λ = 6 mf = ?v = 282 m/sv = f × λ
  7. 11

    A wave travels at 190 m/s with a wavelength of 10 m. What is its frequency?

    λ = 10 mf = ?v = 190 m/sv = f × λ
  8. 12

    A wave travels at 90 m/s with a wavelength of 2 m. What is its frequency?

    λ = 2 mf = ?v = 90 m/sv = f × λ
  9. 13

    A wave has a frequency of 37 Hz and a wavelength of 13 m. What is its speed? (v = fλ)

    λ = 13 mf = 37 Hzv = ?v = f × λ
  10. 14

    A wave travels at 184 m/s with a wavelength of 8 m. What is its frequency?

    λ = 8 mf = ?v = 184 m/sv = f × λ
  11. 15

    A wave travels at 150 m/s with a wavelength of 15 m. What is its frequency?

    λ = 15 mf = ?v = 150 m/sv = f × λ
  12. 16

    A wave travels at 420 m/s with a wavelength of 15 m. What is its frequency?

    λ = 15 mf = ?v = 420 m/sv = f × λ

★ Challenge corner for fast finishers

Why does your breath make fog on a cold window?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/8/wave_equation

Answer key (click to show)
  1. 1.crest
  2. 2.trough
  3. 3.wavelength
  4. 4.amplitude
  5. 5.45 Hz
  6. 6.3 m
  7. 7.630 m/s
  8. 8.20 m/s
  9. 9.2 m
  10. 10.47 Hz
  11. 11.19 Hz
  12. 12.45 Hz
  13. 13.481 m/s
  14. 14.23 Hz
  15. 15.10 Hz
  16. 16.28 Hz
  17. ★water vapor in your breath condenses on the cold glass (challenge corner)

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