Waves Review

What do playing a guitar, banging a drum, and dropping a pebble in water have in common?

• They all produce light.

• They all cause vibrations.

• They all convert heat to energy.

• They need gravity to move.

Answer explanation

Playing a guitar, banging a drum, and dropping a pebble in water all cause vibrations, making this the common factor among them.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Imagine you're at a space station and you hit a metal rod. How would the sound wave behave in the vacuum of space compared to inside the station filled with air?

• In the vacuum of space, the sound wave travels much faster than inside the station because there are no molecules to slow it down.

• Inside the station, the sound wave travels much slower than in the vacuum of space because of the number of molecules in air.

• A sound wave cannot travel in the vacuum of space because there are no molecules to transfer the energy.

• A sound wave travels at the same speed in the vacuum of space as it does inside the station.

Answer explanation

A sound wave cannot travel in the vacuum of space because there are no molecules to transfer the energy.

True or False: Mechanical waves can travel in a vacuum.

• True

• False

Answer explanation

Mechanical waves require a medium to travel, so they cannot propagate in a vacuum. Therefore, the correct answer is False.

Rearrange the events in order to show how sound travels through the ear.

• The sound is created

• The sound wave vibrates the air molecules.

• The ear 'catches' the sound and the ear drum senses the vibrations.

• The vibrations are then turned into electrical pulses that travel to the brain.

• The brain processes the electrical pulse and tells you what sounds you have heard.

Answer explanation

Tags

NGSS.MS-LS1-8

NGSS.MS-PS4-2

True or False: All waves transmit matter.

• True

• False

Answer explanation

The correct answer is False because waves do not transmit matter, they transmit energy.

True or False: Light is a form of energy emitted by the moon.

• True

• False

Answer explanation

False - Light is not emitted by the moon, but rather reflected from the sun. The moon does not produce its own light.

Light is bent as it passes from the air into the water in a clear cup. This bending is called

• reflection

• refraction

• diffraction

• interference

Answer explanation

Light is bent when passing from air to water, known as refraction. Reflection is when light bounces off a surface, not bending. Diffraction and interference are different phenomena.

Tags

NGSS.MS-PS4-2

True or False: Refraction occurs due to the changing speed of a wave as it moves through different types of matter.

• True

• False

Answer explanation

Refraction occurs due to the changing speed of a wave as it moves through different types of matter, making the statement True.

Tags

NGSS.MS-PS4-2

Human eyes respond to a narrow range of wavelengths of electromagnetic waves called

• Ultraviolet Light

• Infrared Light

• Visible Light

• Compressional Light

Answer explanation

Human eyes respond to a narrow range of wavelengths of electromagnetic waves known as Visible Light.

A banana looks yellow because (select all that apply)

• The banana absorbs yellow light.

• The banana reflects yellow light.

• The banana absorbs all colors but yellow.

• The banana reflects all colors but yellow.

Answer explanation

A banana looks yellow because it reflects yellow light and absorbs all colors but yellow, making it appear yellow to our eyes.

Tags

NGSS.MS-PS4-2