Iowa State Science Review

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-PS4-1

NGSS.MS-PS4-2

The diagram shows sound and light waves from an emergency vehicle traveling toward a brick wall. The brick wall has both smooth and rough surfaces.

The sound waves from the siren will _______ the smooth surface of the wall.

• only reflect off

• only pass through

• pass through and reflect off

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The diagram shows sound and light waves from an emergency vehicle traveling toward a brick wall. The brick wall has both smooth and rough surfaces.

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

• only reflect off

• only pass through

• pass through and reflect off

Tags

NGSS.MS-PS4-2

The diagram shows sound and light waves from an emergency vehicle traveling toward a brick wall. The brick wall has both smooth and rough surfaces.

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

• sound waves

• light waves

• sound an light waves

Tags

NGSS.MS-PS4-2

The diagram shows how a sound wave from an emergency vehicle changes as it moves through air and then through a brick wall.

Which statement best describes how the amplitude and energy of a sound wave are affected as the wave travels through air and as the wave travels through a brick wall?

• 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 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

NGSS.MS-PS4-2

The scientists are planning an experiment using a light microscope to collect data. Which statement best describes how scientists can identify non living samples?

• The scientists should look for samples that have objects that look bigger when viewed under the microscope.

• The scientists should look for samples that do not have a nucleus or cell membrane when viewed under the microscope.

• The scientists should look for samples that have carbon atoms when viewed under the microscope.

• The scientists should look for samples that do not have a regular pattern of shapes when viewed under the microscope.

____ Controls many cell functions

• cell membrane

• chloroplasts

• mitochondria

• nucleus

Tags

NGSS.MS-LS1-2

____ produces energy for the cell

• cell membrane

• chloroplasts

• mitochondria

• nucleus

Tags

NGSS.MS-LS1-7