6th grade light, sound and waves
6th grade (Year 7 in England) · 16 questions · Common Core: NGSS.MS-PS4-1, NGSS.4-PS4-1, NGSS.MS-PS4-2 · England: KS3 Physics: Waves (observed waves), KS4 Combined Science: Waves in matter, KS3 Physics: Waves (sound)
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Question 1
Is this a transverse or a longitudinal wave: sound in air?
- A. transverse
- B. longitudinal
Question 2
Why can you see your reflection in a mirror but not in a sheet of white paper?
- A. Mirrors make light
- B. The mirror gives regular (specular) reflection; rough paper scatters light in all directions
- C. Paper absorbs all light
- D. Paper is transparent
Question 3
Why does the upper limit of hearing often fall as people get older?
- A. Older people make higher sounds
- B. Sound gets slower
- C. Sensitive cells in the inner ear are gradually damaged
- D. The ear canal gets wider
Question 4
50 waves pass a point in 5 seconds. What is the frequency, in hertz (Hz)?
AnswerHz
Question 5
Humans can hear from about 20 Hz to 20 000 Hz. Could a young person hear a sound of 2 kHz?
- A. yes
- B. no, it is ultrasound
Question 6
A ray of light hits a flat mirror with an angle of incidence of 25°. What is the angle of reflection, in degrees?
Answer°
Question 7
A ray of light makes an angle of 20° with the surface of a mirror. What is the angle between the incident ray and the reflected ray, in degrees?
Answer°
Question 8
A guitar string vibrates 500 times in 2 seconds. What is the frequency of the sound, in hertz (Hz)?
AnswerHz
Question 9
Which part of the wave is marked on the diagram?
- A. trough
- B. wavelength
- C. crest (peak)
- D. amplitude
Question 10
Is this a transverse or a longitudinal wave: light?
- A. transverse
- B. longitudinal
Question 11
Why can you see your reflection in a mirror but not in a sheet of white paper?
- A. Paper absorbs all light
- B. The mirror gives regular (specular) reflection; rough paper scatters light in all directions
- C. Mirrors make light
- D. Paper is transparent
Question 12
Why does the upper limit of hearing often fall as people get older?
- A. The ear canal gets wider
- B. Sensitive cells in the inner ear are gradually damaged
- C. Sound gets slower
- D. Older people make higher sounds
Question 13
40 waves pass a point in 10 seconds. What is the frequency, in hertz (Hz)?
AnswerHz
Question 14
A dog whistle produces sound at 50 kHz. What is this frequency in Hz? (1 kHz = 1000 Hz)
AnswerHz
Question 15
A ray of light hits a flat mirror with an angle of incidence of 40°. What is the angle of reflection, in degrees?
Answer°
Question 16
A ray of light makes an angle of 30° with the surface of a mirror. What is the angle between the incident ray and the reflected ray, in degrees?
Answer°
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