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Why are humans unable to hear ultrasound waves?

• Ultrasound waves do not cause matter to vibrate.

• Ultrasound waves do not have energy when traveling.

• Ultrasound waves have a higher frequency than humans can hear.

• Ultrasound waves have a larger amplitude than humans can hear.

How does sonar detect an object in water?

• by sending sound waves that reflect off the object

• by sending sound waves that are absorbed by the object

• by sending sound waves to detect the composition of the object

• by sending sound waves that measure the object’s temperature

Tags

NGSS.MS-PS4-2

Which best explains why a person can get sunburned while submerged in water?

• Ultraviolet light is transmitted by the water.

• Ultraviolet light is absorbed by the water.

• Ultraviolet light penetrates the water.

• Ultraviolet light scatters the water.

Tags

NGSS.MS-PS4-2

Which best describes the relationship between human sight and the electromagnetic spectrum?

• Human eyes register and see the ultraviolet wavelengths of the electromagnetic spectrum.

• Human eyes detect and see a limited band of wavelengths of the electromagnetic spectrum.

• Human eyes absorb and see infrared wavelengths of the electromagnetic spectrum.

• Human eyes can see the microwave lengths of the electromagnetic spectrum.

Which best describes how sound waves traveling in air are similar to P-waves?

• Both travel faster than the speed of light.

• Both have rarefactions and compressions.

• Neither have rarefactions and compressions.

• Both have crests and troughs greater than those found in light waves.

Tags

NGSS.MS-PS4-1

How are the primary waves of an earthquake and sound waves similar?

• Both are transverse waves.

• Both are longitudinal waves.

• Neither wave transmits energy.

• Neither wave is longitudinal.

Which best describes the source of all sound waves?

• high and low pressure

• a vibrating object

• a heated object

• a wave pattern

Which most likely describes how sound waves are produced?

• Sound waves occur as air molecules are disturbed.

• Sound waves occur as water molecules evaporate.

• Sound waves occur as light moves through a medium.

• Sound waves occur as energy ripples through Earth’s surface.

Tags

NGSS.MS-PS4-1

Why does sound travel better through a stretched-out string than through air?

• The stretched-out string molecules vibrate more than the air molecules.

• The stretched-out string molecules are farther apart than the air molecules.

• The stretched-out string molecules are closer together than the air molecules.

• The stretched-out string molecules have a higher temperature than the air molecules.

Tags

NGSS.MS-PS4-2

How does sound usually travel?

• An object vibrates, and those vibrations travel through the air in one direction as transverse waves.

• An object vibrates, and those vibrations carry air in one direction as longitudinal waves.

• An object vibrates, and those vibrations carry air in all directions as transverse waves.

• An object vibrates, and those vibrations travel through the air in all directions as longitudinal waves.