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9th grade light, sound and waves

9th grade (Year 10 in England) · 15 questions · Common Core: NGSS.HS-PS4-1, NGSS.HS-PS4-3, NGSS.HS-PS4-4, NGSS.HS-PS4-5 · England: KS4 Combined Science: Waves in matter, KS4 Combined Science: Light and electromagnetic waves, GCSE Combined Science: Waves (Physics only: period)

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  1. Question 1

    Which type of electromagnetic wave is used for TV remote controls?

    • A. microwaves
    • B. infrared
    • C. gamma rays
    • D. X-rays

  2. Question 2

    A sound wave has a period of 0.004 s and travels at 340 m/s. What is its wavelength, in m? (v = f λ)

    Answerm

  3. Question 3

    One complete vibration takes 0.5 s. What is the frequency, in Hz?

    AnswerHz

  4. Question 4

    A wave has a frequency of 2 Hz. What is its period (the time for one wave), in seconds?

    Answers

  5. Question 5

    The electromagnetic spectrum: which statement is NOT true?

    • A. All electromagnetic waves travel at the same speed in a vacuum.
    • B. Electromagnetic waves need a material to travel through.
    • C. Visible light is only a small part of the electromagnetic spectrum.
    • D. Ultraviolet can damage skin cells and cause sunburn.

  6. Question 6

    A wave has a frequency of 50 Hz and a wavelength of 2 m. What is its speed, in m/s?

    Answerm/s

  7. Question 7

    Sound travels at 340 m/s in air. What is the wavelength of a 340 Hz sound, in metres?

    Answerm

  8. Question 8

    A wave has a frequency of 100 Hz. What is its period, in seconds?

    Answers

  9. Question 9

    Which type of electromagnetic wave is used for energy-efficient fluorescent lamps?

    • A. gamma rays
    • B. microwaves
    • C. X-rays
    • D. ultraviolet

  10. Question 10

    A sound wave has a period of 0.004 s and travels at 330 m/s. What is its wavelength, in m? (v = f λ)

    Answerm

  11. Question 11

    One complete vibration takes 0.01 s. What is the frequency, in Hz?

    AnswerHz

  12. Question 12

    A wave has a frequency of 2 Hz. What is its period (the time for one wave), in seconds?

    Answers

  13. Question 13

    The electromagnetic spectrum: which statement is NOT true?

    • A. Visible light is only a small part of the electromagnetic spectrum.
    • B. Electromagnetic waves need a material to travel through.
    • C. All electromagnetic waves travel at the same speed in a vacuum.
    • D. Ultraviolet can damage skin cells and cause sunburn.

  14. Question 14

    A wave has a frequency of 50 Hz and a wavelength of 2 m. What is its speed, in m/s?

    Answerm/s

  15. Question 15

    Sound travels at 340 m/s in air. What is the wavelength of a 1360 Hz sound, in metres?

    Answerm

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Answer key: 9th grade light, sound and waves

  1. 1. B. infrared

  2. 2. 1.36 m

  3. 3. 2 Hz

  4. 4. 0.5 s

  5. 5. B. Electromagnetic waves need a material to travel through.

  6. 6. 100 m/s

  7. 7. 1 m

  8. 8. 0.01 s

  9. 9. D. ultraviolet

  10. 10. 1.32 m

  11. 11. 100 Hz

  12. 12. 0.5 s

  13. 13. B. Electromagnetic waves need a material to travel through.

  14. 14. 100 m/s

  15. 15. 0.25 m