Speed of Waves

Light travels slower in the Perspex than in the water because Perspex is more dense than the water, meaning it has more molecules that are attempting the block the light waves from passing through.

• True

• False

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NGSS.MS-PS4-2

The speed of light through water is 230,000,000 m/s per second. Refer to the data table to see the speed of a sound wave through water. What conclusion can I draw from the information?

• Waves move at the same speed regardless of the type of wave

• Mechanical waves (sound) move faster than Electromagnetic waves (liquid)

• Electromagnetic waves (light) move faster than Mechanical waves (sound)

• There is not enough data to answer the question

Tags

NGSS.MS-PS4-2

Roughly what is the speed of sound in air?

• About 350 m/s

• About 1 500 m/s

• About 5000 m/s

• About 1800 m/s

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Roughly what is the speed of sound in water?

• About 350 m/s

• About 1 500 m/s

• About 5000 m/s

• About 1800 m/s

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Steel is a very dense solid, but when I compare the steel at 32 degrees, I see that it travels a little slower than the steel at 68 degrees.

• Heat has no effect on how fast or slow molecules move.

• This is true because the heat causes the molecules to vibrate a bit slower.

• This is true because the heat causes the molecules to stay still a bit longer.

• This is true because the heat causes the molecules to vibrate a bit faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When comparing sound traveling through the air, I can tell from the chart, it travels faster at 1,127 ft/sec because...

• the temperature is 68 degrees, which means the molecules are able to transfer the waves faster.

• the temperature is 32 degrees, which means the molecules are able to transfer the waves faster.

• the temperature is always the same for air, so the temperature does not make a difference

• air is a gas that is spread out and allows the sound waves to travel through it faster

Tags

NGSS.MS-PS4-2

Sonia tapped one end of a long wooden table. Antonio and Marc listened for the sounds. Antonio pressed his ear to the table. Marc did not. Antonio heard the taps before Marc did. Why did Antonio hear the sound before Marc?

• Sound travels through wood and air at different speeds

• The frequency of the taps was different in wood and in air

• Particles of wood are farther apart than particles of air

• The taps made the table vibrate but not the air

Tags

NGSS.MS-PS4-2

Arianna is experimenting with different materials to see which one will transmit sound the fastest.

Through which of the following materials will sound waves travel the fastest?

• air

• concrete

• oil

• water

Tags

NGSS.MS-PS4-2

What is the speed of sound in air at room temperature?

• 343 m/s

• 300 m/s

• 1500 m/s

• 1200 m/s

Tags

NGSS.MS-PS4-1

Which of the following factors does NOT affect the speed of a wave?

• Medium through which it travels

• Frequency of the wave

• Amplitude of the wave

• Temperature of the medium