Sc 7 P 10 3

Based on the information in Figure 1 and Table 1, which statement best compares

a sound wave in a vacuum to a sound wave in air?

• A sound wave in a vacuum travels much faster than a sound wave in air because there are no molecules to slow it down.

• A sound wave in air travels much slower than a sound wave in a vacuum because of the number of molecules in air.

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

• A sound wave travels at the same speed in a vacuum as a sound wave in air does.

Tags

NGSS.MS-PS4-2

Choose the correct word to complete the statement. The sound waves from the siren will __________ the smooth surface of the wall.

• only reflect off

• only pass through

• pass through and refect off

Tags

NGSS.MS-PS4-2

Choose the correct word to complete the statement.

The light waves from the emergency vehicle will __________ the smooth surface of the wall.

• only reflect off

• only pass through

• pass through and refect off

Tags

NGSS.MS-PS4-2

Choose the correct word to complete the statement.

Rougher sections of the wall surface will cause the _________ from the emergency vehicle to scatter.

• only reflect off

• only pass through

• pass through and refect off

Tags

NGSS.MS-PS4-2

• The sound wave has less energy and a larger amplitude when traveling through a brick wall than when traveling through air.

• The sound wave has more energy and a smaller amplitude when traveling through a brick wall than when traveling through air.

• The sound wave has more energy and a larger amplitude when traveling through a brick wall than when traveling through air.

• The sound wave has less energy and a smaller amplitude when traveling through a brick wall than when traveling through air.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Part A

Based on Figure 2, which statement best describes how the pitch and the frequency of sound waves are related?

• Sound waves with a higher frequency have a higher pitch.

• Sound waves with a lower frequency have a higher pitch.

• Sound waves with a higher frequency have a lower pitch.

• Sound waves with higher and lower frequencies can have the same pitch.

Part B:

Which evidence from figure 2 best supports the answer to Part A?

• The ambulance sound waves have fewer waves and a longer wavelength.

• The fire truck sound waves have fewer waves and a shorter wavelength.

• The ambulance sound waves have more waves and a shorter wavelength.

• The fire truck sound waves have more waves and a longer wavelength.

Tags

NGSS.MS-PS4-1