Waves and Signals Quiz

Which property of a wave is measured from the rest position to the crest?

• Wavelength

• Amplitude

• Frequency

• Speed

Tags

NGSS.MS-PS4-1

What is the unit of frequency for a wave?

• Meters

• Seconds

• Hertz

• Newtons

Which type of wave requires a medium to travel?

• Light wave

• Sound wave

• Radio wave

• X-ray

What happens to the speed of light when it passes from air into water?

• It increases

• It decreases

• It stays the same

• It stops

Tags

NGSS.MS-PS4-2

Which term describes the bending of a wave as it passes around an obstacle?

• Reflection

• Refraction

• Diffraction

• Absorption

Which of the following is an example of an analog signal?

• A digital clock display

• A vinyl record player

• A computer file

• A barcode scanner

Tags

NGSS.MS-PS4-3

Which device commonly uses digital signals to transmit information?

• Cassette tape player

• Compact disc (CD) player

• Chalkboard

• Thermometer with mercury

Tags

NGSS.MS-PS4-3

What is the main difference between analog and digital signals?

• Analog signals are always faster

• Digital signals use discrete values, analog signals are continuous

• Analog signals are more reliable

• Digital signals cannot be transmitted

Tags

NGSS.MS-PS4-3

Which of the following is a benefit of using digital signals over analog signals?

• Digital signals are more easily affected by noise

• Digital signals can be copied without loss of quality

• Analog signals are easier to store

• Analog signals are more secure

Tags

NGSS.MS-PS4-3

Which of the following best describes how information is encoded in a digital signal?

• By varying the amplitude smoothly

• By using a series of 0s and 1s

• By changing the color of light

• By using continuous waves

Tags

NGSS.MS-PS4-3