Waves and EMS Review

A student places a cork upright in a wave tank filled with water. The image shows how a wave ripples across the tank. The cork does not change its position within the wave; instead, it moves up and down in its original position. What can be concluded about mechanical waves from this activity?

• Mechanical waves carry the particles of mediums along with the waves.

• Mechanical waves can move through empty spaces.

• Mechanical waves transfer energy but not matter.

• Mechanical waves do not carry energy.

Tags

NGSS.MS-PS4-1

Examine the diagram of different waves labeled J-M. Which wave best demonstrates the wave behavior of absorption?

• wave J

• wave K

• wave L

• wave M

Tags

NGSS.MS-PS4-2

A sound-proof window has two panes of glass with a vacuum in between. Why is sound unable to travel through the window while light can still shine through?

• Sound has a different frequency than light, so it cannot pass through the window.

• Sound has a different wavelength than light, so it cannot pass through the window.

• Light can travel through both the glass and the vacuum, but sound can travel only through the glass.

• Light can travel through both the glass and the vacuum, but sound can travel only through the vacuum.

Tags

NGSS.MS-PS4-2

Which of these materials on the walls of a room would work best to keep sound from making an echo?

• marble

• carpet

• wood

• glass

Tags

NGSS.MS-PS4-2

Which of these is a way that sunglasses help protect the eyes?

• reflecting light rays away from the eyes

• refracting more light rays into the eyes

• reflecting more light rays into the eyes

• refracting light rays away from the eyes

Tags

NGSS.MS-PS4-2

A beam of light is directed toward a tank filled with water. What causes the beam of light to change direction?

• change in media

• change in altitude

• increase in pressure

• increase in temperature

Tags

NGSS.MS-PS4-2

The diagram shows what happened when light hit a mirror. Which statement best explains the diagram?

• The light refracted.

• The light reflected.

• The mirror absorbed the light.

• The mirror scattered the light.

Tags

NGSS.MS-PS4-2

A city put up a mirror at a sharp curve in a road. How will the mirror most likely benefit drivers?

• The drivers will be able to see around the bend.

• The drivers will be able to see themselves.

• The mirror will make the road look wider.

• The mirror will make drivers slow down.

Frank shined a beam of light at the surface of a mirror. A piece of paper above the mirror was lit up. What caused the light to shine on the paper above the mirror?

• The light was refracted.

• The light was reflected.

• The light was amplified.

• The light was diffracted.

Tags

NGSS.MS-PS4-2

The speed of sound is generally greatest in

• solids and lowest in liquids.

• solids and lowest in gases.

• gases and lowest in liquids.

• gases and lowest in solids.

Tags

NGSS.MS-PS4-2