Waves Speed and Direction

Which of the following is a MAIN factor that affects the speed of a wave?

• The pitch of the sound.

• The loudness of the sound.

• The amplitude of the wave.

• The properties of the medium

One could conclude that sound is transmitted fastest in

• Solids

• liquids

• gases

• vacuum

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

In a vacuum, radio waves, visible light, and x-rays all have the same

• wave length

• speed

• frequency

• energy

Tags

NGSS.HS-PS4-1

A beam of light is shining on the surface of a liquid. Which diagram shows what happens when the light is reflected by the liquid?

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NGSS.MS-PS4-2

Ultrasound devices use sound waves to create images that allow doctors to see inside the human body. Which BEST describes how sound waves are able to help create these images?

• Sound waves can be absorbed

• Sound waves reflect off objects

• Sound waves measure different temperatures.

• Sound waves changes speed in different materials.

Tags

NGSS.MS-PS4-2

Which diagram below illustrates the absorption of light energy?

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NGSS.MS-PS4-2

Which of the following statements BEST explains why lightning is seen before thunder is heard?

• Electromagnetic waves travel faster than mechanical waves in the air.

• Electromagnetic waves have a higher frequency than mechanical waves.

• Electromagnetic waves experience less interference than mechanical waves.

• Electromagnetic waves form faster than mechanical waves during a thunderstorm.

Tags

NGSS.HS-PS4-1

Kelly shines a flashlight at a wall. The beam of light creates a bright space on the wall. Kelly holds up a piece of black cardboard in front of the light. This stops the beam of light, and it does not shine on the wall.

Which effect does the black cardboard have on the beam of light?

• Absorption

• Brightness

• Reflection

• Refraction

Tags

NGSS.MS-PS4-2

The diagram shows what occurs when a ray of light strikes and enters a pond.

Which property of light is illustrated when the ray enters the pond?

• refraction

• reflection

• absorption

• emission

Tags

NGSS.MS-PS4-2

Bats produce high-frequency sounds and then listen for echos of these sounds bouncing off objects.

The high-frequency sound waves that bats produce MOST LIKELY have...

• long wave lengths

• short wave lengths

• vibrating wave lengths

• alternating wave lengths.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2