Waves HS

Which of the following describes how a mechanical wave is different from an electromagnetic wave?

• Mechanical waves require a medium; electromagnetic waves don't.

• Mechanical waves transmit energy; electromagnetic waves transmit matter.

• Electromagnetic waves require a medium; mechanical waves don't.

• Electromagnetic waves transmit energy; mechanical waves transmit matter.

A wave can make a leaf bob up and down on the water, but it cannot move the leaf toward the shore. This is because waves only transfer

• Matter

• Energy

• Medium

• Forces

Tags

NGSS.MS-PS4-2

You and your father inspect an empty house with the hopes of buying it. You walk through the rooms talking to one another, and you notice that your voices and footsteps are echoing in the big, empty house. What causes the echo?

• sound waves moving slowly through air

• sound waves refracting around corners in the empty rooms

• sound waves moving around the large rooms

• sound waves reflecting off smooth, flat surfaces throughout the house

Tags

NGSS.MS-PS4-2

The speed of a sound wave depends on

• its source

• the force of its compressions.

• the number of waves per second.

• the medium through which it travels.

Imagine a ringing bell set inside a sealed glass jar. Once all the air is removed and a vacuum is created, the ringing sound is no longer heard. Explain why this happens.

• The glass prevents any sound from escaping.

• The lack of air in the jar causes the ringing to stop.

• Without air, the sound waves cannot travel to the ear.

• The pressure of the outside air causes the sound to remain within the jar.

Tags

NGSS.MS-PS4-2

In old western movies, cowboys would often put their ear to a train track to listen for an oncoming train. What benefit would this provide over listening for the train in the air?

• The sound will be louder.

• The sound would be undistorted.

• The sound will reach him sooner.

• The sound would be a higher frequency

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

If you are lying on a raft, and you notice that the number of waves that go past the raft increases, you also find that the distance between each crest ____.

• Increases

• Decreases

• Remains the same

• Alternates

Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called

• Longitudinal

• Transverse

• Electromagnetic

• Mechanical

An electromagnetic wave

• never moves.

• can travel only through empty space.

• cannot travel through matter.

• can travel through empty space or matter.

Tags

NGSS.MS-PS4-2

What order are the colors of the visible light waves beginning with the lowest frequency?

• violet, indigo, blue, green, yellow, orange, red

• red, orange, yellow, green, blue, indigo, violet

• orange, yellow, green, blue, indigo, violet, red

• red, orange, yellow, green, blue, indigo, purple