This graph is accurate because

electromagnetic waves move faster than mechanical waves.

mechanical waves cannot travel through a medium.

electromagnetic waves cannot travel through a vacuum.

mechanical waves move faster than electromagnetic waves.

As the band passed by, the beating drums and trumpets made Billy feel like his body was beating with the music. He could hear the music and he could feel it!

Sound waves transmit energy through all forms of matter.

Sound waves cannot travel through the air

The marching causes the ground to move which Billy feels

Sound waves are transmitted faster through gases than through solids.

If we compare and contrast electromagnetic waves with sound waves, all BUT one statement is true. That is

electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere.

sound waves require a medium to travel while electromagnetic waves do not.

electromagnetic waves can travel through the vacuum of space while sound waves cannot.

sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

A boat at rest on the ocean moves up and down as water waves pass beneath it. What can be concluded about the nature of the water particles in the waves from this observation?

The water particles move perpendicular to the direction of the waves.

The water particles move parallel to the direction of the waves.

The water particles move along the direction of the waves.

The water particles move in random directions.

A piece of driftwood moves up and down as water waves pass beneath it. However, it does not move toward the shore with the waves. What does this demonstrate about the propagation of waves through a medium?

Waves transmit energy but not matter as they progress through a medium.

Waves transmit matter but not energy as they progress through a medium.

Waves do not transmit matter or energy as they progress through a medium.

A boat at rest on the ocean moves up and down as water waves pass beneath it. What can be concluded about the movement of the water particles within a water wave?

Water particles move vertically, up and down in circles.

Water particles move horizontally with the wave energy.

Water particles move in the same direction as the wave energy.

Water particles in an ocean wave move in circles, as seen in the illustration above. This particle movement causes a wooden raft to

move horizontally until it reaches the shore.

What statement explains the changes from wave A to wave B?

The energy and amplitude increase.

The energy and amplitude decrease.

The energy decreases as the amplitude increases.

The energy increases as the amplitude decreases.

Two people each hold the end of a rope and create waves by moving their arms up and down. This wave is best classified as a transverse wave because ___________

the wave is moving horizontally as the particles of the rope move up and down.

both the rope particles and the wave are moving in the same direction.

the wave is moving up and down as the particles of the rope move horizontally.

the wave is moving in a parallel direction with the motion of the person's arms.

Sarah and Maria made a telephone using two cans and a string. It was a very long string. Maria went upstairs in her house and Sarah stayed downstairs. Maria spoke softly into the can. "I can hear you!' Sarah said back. How can this happen?

Sound waves travel through solids like the string.

Sound waves travel through a vacuum.

Sound waves travel from high to low.

Maria talked so loudly that Sarah could hear her without the phone.

An old movie poster used a quote "In space, no one can hear you scream!" Why this is true or not true?

Sound needs a medium for the wave to vibrate and there is nothing in space to vibrate.

The quote is incorrect, you can hear sound in outer space.

Sound cannot be polarized. So, you cannot hear sound in space.

Sound is an electromagnetic wave and needs no medium to travel through.

Mechanical (sound) waves are unable to travel through a vacuum, such as through space, but radio waves are transmitted to Earth from satellites. How is this possible?

Radio waves are electromagnetic waves.

Satellites are located within our atmosphere.

Radio waves are very high energy mechanical waves.

Radio waves are changed to gamma rays for transmission.

Which of these actions is the BEST evidence that waves can cause objects to move?

A surfer rides back to the beach on his surfboard.

A speed boat races in circles around the lake,

A teenager swims to shore after an ocean swim.

A dog fetches a ball tossed in a lake and brings it back to the dock.

Which of these waves would have the greatest amount of energy?

There is not enough information

Looking at the diagram showing two waves. Notice, wave A is taller and wave B is thinner. Wave B

has a shorter amplitude and wavelength.

has a bigger amplitude and shorter wavelength.

has a shorter amplitude and longer wavelength.

has a bigger amplitude and wavelength.

science 8th unite 4 study guide

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43 questions

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A pebble is thrown into a calm lake, ripples are formed from the center and move outward. The water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels

horizontally

diagonally

downward

upward

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The answer is energy. The energy is carried perpendicular to the movement of the ocean waves.

amplitude

energy

frequencies

wavelengths

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A represents the amplitude of the wave. This measures the sound wave's intensity, or volume.

amplitude

frequency

period

wavelength

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Identify the characteristic of the transverse wave that halved from wave A (black) to wave B (green).

amplitude

crest

trough

wavelength

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Identify the characteristic of a transverse wave that doubled from wave A to wave B.

amplitude

crest

trough

wavelength

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What does B represent?

amplitude

crest

trough

wavelength

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The distance from point A to point B is known as the

wave height.

wavelength.

amplitude

volume.

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science 8th unite 4 study guide

A pebble is thrown into a calm lake, ripples are formed from the center and move outward. The water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels

The answer is energy. The energy is carried perpendicular to the movement of the ocean waves.

A represents the amplitude of the wave. This measures the sound wave's intensity, or volume.

Identify the characteristic of the transverse wave that halved from wave A (black) to wave B (green).

Identify the characteristic of a transverse wave that doubled from wave A to wave B.

What does B represent?

The distance from point A to point B is known as the

The crest of a transverse wave is BEST shown by letter

The crest of a transverse wave is BEST shown by letter

The crest of a transverse wave is BEST shown by letter

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