Waves Unit Test Review

What happens when sound waves encounter a small opening or obstacle (diffraction)?

• The waves increase in speed and pass through without change.

• The waves bend around the edges of the opening or obstacle.

• The waves immediately stop and do not pass through the opening.

• The waves convert into light waves and pass through the opening.

Tags

NGSS.MS-PS4-2

Which property of sound determines its pitch?

• Amplitude

• Frequency

• Reflection

• Refraction

What happens to the speed of light as it passes from air into glass?

• It increases, leading to a change in direction

• It remains constant, causing no change in direction

• It decreases, leading to a change in direction

• It fluctuates, causing unpredictable effects

Tags

NGSS.MS-PS4-2

Which of the following waves can travel through a vacuum?

• sound waves

• water waves

• light waves

• seismic waves

Changing the temperature of a medium will alter the __________ of sound waves.

• frequency

• speed

• amplitude

• wavelength

What determines the color of a transparent object?

• the colors of light that are absorbed

• the colors of light that are reflected

• the colors of light that are transmitted

• the colors of light that are refracted

Tags

NGSS.MS-PS4-2

What is the reason you can see the flash of lightning before hearing the thunder during a storm?

• Thunder travels slower than lightning.

• Lightning travels at the speed of sound, making it audible before visible.

• Light travels faster than sound, allowing you to see lightning before hearing thunder.

• The sound of thunder is delayed due to the distance from the storm.

Tags

NGSS.MS-PS4-1

As light travels from air to water to glass, it will refract. The best explanation for this would be ________

• glass is less transparent than water, which is less transparent than air

• light will be transmitted into the new medium each time it reaches a boundary

• a light wave reflects off molecules as it travels, this causes the light to bend

• the speed of a wave slows as it travels at different speeds in different medias

Tags

NGSS.MS-PS4-2

Why can radio waves transmit signals from space to Earth, while sound cannot?

• Sound waves require a medium to travel

• Radio waves are only effective within the Earth's atmosphere

• Sound waves are too slow to reach Earth from space

• Radio waves are converted into sound waves in space before transmission

A wave has a frequency of 50 Hz and a wavelength of 10 meters. What is the wave speed?

• 10 Hz

• 10 m/s

• 5 m

• 500 m/s