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Eighth Grade (Grade 8) Waves and Sound Questions

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Grade 8 Waves and Sound
Electromagnetic waves can travel through a vacuum.
  1. True
  2. False
Grade 8 Waves and Sound
Complementary colors are
  1. colors that combine to form secondary colors.
  2. all the colors of the rainbow.
  3. any two colors that combine to form white light.
  4. colors that cannot be split into component colors.
Grade 8 Waves and Sound
What property of a wave measures its height or intensity?
  1. Wavelength
  2. Time period
  3. Amplitude
  4. Frequency
Grade 8 Waves and Sound
Which term refers to how high or low a sound seems to a person?
  1. loudness
  2. intensity
  3. frequency
  4. pitch
Grade 8 Waves and Sound
What is the main purpose of a computer network?
  1. To store data on a central server
  2. To analyze data on computing devices
  3. To connect two or more computing devices for data transfer and sharing
  4. To publish data in print form
Grade 8 Waves and Sound
What is the main purpose of a mobile phone?
  1. To convert voice into electrical signals
  2. To transfer energy through matter
  3. To function as a landline
  4. To generate electromagnetic waves
Grade 8 Waves and Sound
Which type of lens is used to bring parallel rays of light to a focal point for an accurate and inverted image in a microscope?
  1. Converging lens
  2. Diverging lens
  3. Biconvex lens
  4. Plano-concave lens
Grade 8 Waves and Sound
Infrared thermometers were particularly beneficial during which event?
  1. The launch of a new medical device
  2. An industry conference
  3. A volcanic eruption
  4. The COVID-19 outbreak
Grade 8 Waves and Sound
What is the role of a television camera in producing a television image?
  1. Capturing electromagnetic waves
  2. Transforming light into electrical impulses
  3. Amplifying electrical signals
  4. Modulating the radio wave signal
Grade 8 Waves and Sound
The basic groups of musical instruments are                                    .
  1. stringed, electric, and percussion.
  2. stringed, wind, and percussion.
  3. brass, woodwind, and percussion.
  4. acoustic, electric and percussion
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