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Speed of sound and echoes

7th grade (Year 8 in England) · 16 questions · Common Core: NGSS.MS-PS4-1 · England: KS3 Physics: Waves (sound waves)

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  1. Question 1

    You see lightning and hear the thunder 6 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

  2. Question 2

    Why do you see lightning before you hear thunder?

    • A. Sound travels faster than light
    • B. Your eyes are faster than your ears
    • C. Thunder is made later
    • D. Light travels much faster than sound

  3. Question 3

    You shout towards a cliff and hear the echo 1.5 s later. Sound travels at 340 m/s. How far away is the cliff, in metres?

    Answerm

  4. Question 4

    You see lightning and hear the thunder 2 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

  5. Question 5

    In which material does sound travel fastest?

    • A. water
    • B. a vacuum
    • C. air
    • D. steel

  6. Question 6

    You shout towards a cliff and hear the echo 0.5 s later. Sound travels at 340 m/s. How far away is the cliff, in metres?

    Answerm

  7. Question 7

    You see lightning and hear the thunder 4 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

  8. Question 8

    Why do you see lightning before you hear thunder?

    • A. Light travels much faster than sound
    • B. Your eyes are faster than your ears
    • C. Thunder is made later
    • D. Sound travels faster than light

  9. Question 9

    You shout towards a cliff and hear the echo 0.5 s later. Sound travels at 340 m/s. How far away is the cliff, in metres?

    Answerm

  10. Question 10

    You see lightning and hear the thunder 2 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

  11. Question 11

    What is ultrasound?

    • A. sound with a frequency too high for humans to hear
    • B. light we cannot see
    • C. sound that travels in a vacuum
    • D. very loud sound

  12. Question 12

    You shout towards a cliff and hear the echo 2 s later. Sound travels at 340 m/s. How far away is the cliff, in metres?

    Answerm

  13. Question 13

    You see lightning and hear the thunder 3 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

  14. Question 14

    Why do you see lightning before you hear thunder?

    • A. Sound travels faster than light
    • B. Light travels much faster than sound
    • C. Thunder is made later
    • D. Your eyes are faster than your ears

  15. Question 15

    You shout towards a cliff and hear the echo 1.5 s later. Sound travels at 340 m/s. How far away is the cliff, in metres?

    Answerm

  16. Question 16

    You see lightning and hear the thunder 4 seconds later. Sound travels at about 340 m/s. About how far away is the storm, in metres?

    Answerm

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Answer key: Speed of sound and echoes

  1. 1. 2040 m

  2. 2. D. Light travels much faster than sound

  3. 3. 255 m

  4. 4. 680 m

  5. 5. D. steel

  6. 6. 85 m

  7. 7. 1360 m

  8. 8. A. Light travels much faster than sound

  9. 9. 85 m

  10. 10. 680 m

  11. 11. A. sound with a frequency too high for humans to hear

  12. 12. 340 m

  13. 13. 1020 m

  14. 14. B. Light travels much faster than sound

  15. 15. 255 m

  16. 16. 1360 m