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Ninth Grade (Grade 9) Waves and Sound Questions

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Grade 9 Waves and Sound
Sound travels slower in denser mediums.
  1. True
  2. False
Grade 9 Waves and Sound

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Wave energy relates directly with frequency. Which of the following types of radiation has the greatest amount of energy?
  1. radio
  2. gamma
  3. ultraviolet
  4. microwave
Grade 9 Waves and Sound
A sound wave with greater intensity sounds higher.
  1. True
  2. False
Grade 9 Waves and Sound

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In the visible spectrum, the color                 has a lower frequency than the color                .
  1. orange; green
  2. blue; yellow
  3. yellow; red
  4. violet; blue
Grade 9 Waves and Sound

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Far infrared light is closer to the microwave portion of the electromagnetic spectrum than it is to visible light. Which wavelength would be best described as being far infrared?
  1. 10-3m
  2. 10-4m
  3. 10-5m
  4. 10-6m
Grade 9 Waves and Sound

This question is a part of a group with common instructions. View group »

Which word best describes the relationship between wavelength and frequency?
  1. linear
  2. inverse
  3. variable
  4. exponential
Grade 9 Waves and Sound
Glow in the dark items such as Halloween decorations are                 .
  1. fluorescent
  2. phosphorescent
  3. chemiluminescent
  4. bioluminescent
Grade 9 Waves and Sound
A ray of light that travels towards a reflecting surface is the
  1. reflected ray.
  2. reflected surface.
  3. incident ray.
  4. none of the above.
Grade 9 Waves and Sound
Sound travels faster though air than it does wood.
  1. True
  2. False
Grade 9 Waves and Sound
The line from the point of incidence at 90 degrees to the optical device is the
  1. reflecting surface.
  2. normal.
  3. angle of reflection.
  4. none of the above.
Grade 9 Waves and Sound

This question is a part of a group with common instructions. View group »

Which electromagnetic waves have a frequency of 1013Hz?
  1. x-ray
  2. visible
  3. gamma
  4. infrared
Grade 9 Waves and Sound
A convex mirror
  1. has the same thickness throughout.
  2. is thinner in the middle.
  3. is thicker in the middle.
Grade 9 Waves and Sound
A glow stick that has to be snapped before working is an example of
  1. bioluminescence.
  2. chemiluminescence.
  3. phosphorescence.
  4. incandescence.
Grade 9 Waves and Sound
The spot where the incident ray strikes the reflecting surface is the
  1. angle of incidence.
  2. incident ray.
  3. point of incidence.
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