2/27 Test

Question 1

What is a wave?

Answer 1

A disturbance that transfers energy from place to place

Waves can be mechanical or electromagnetic.

Question 2

What is the matter a wave travels through called?

Answer 2

Medium

The medium can be solid, liquid, or gas.

Question 3

What type of wave moves through some type of matter?

Answer 3

Mechanical wave

Mechanical waves require a medium to travel.

Question 4

True or false: A mechanical wave can travel through a vacuum.

Answer 4

FALSE

Mechanical waves cannot travel through a vacuum.

Question 5

What are sound waves?

Answer 5

A type of mechanical wave

Sound waves require a medium, such as air or water, to travel.

Question 6

What is another type of wave besides mechanical waves?

Answer 6

Electromagnetic wave

Electromagnetic waves do not require a medium to travel.

Question 7

Name examples of electromagnetic waves.

Answer 7

• Radio waves
• X-rays
• Microwaves

Electromagnetic waves can travel through a vacuum.

Question 8

Both mechanical and electromagnetic waves transfer energy without a _______.

Answer 8

transfer of matter

Waves carry energy but do not move matter to a new place.

Question 9

In a transverse wave, how does the wave travel in relation to the direction of the source?

Answer 9

Perpendicular (up and down)

The wave moves at right angles to the direction of the source.

Question 10

What is the top or highest point of a transverse wave called?

Answer 10

Crest

The crest is the peak of the wave.

Question 11

What is the bottom or lowest point of a transverse wave called?

Answer 11

Trough

The trough is the lowest point of the wave.

Question 12

What is the distance between a crest and the halfway point called?

Answer 12

Amplitude

Amplitude measures the height of the wave from the rest position.

Question 13

What type of wave is a longitudinal wave?

Answer 13

A wave that travels in the same direction as the vibrations (back and forth)

Longitudinal waves are characterized by compressions and rarefactions.

Question 14

In a longitudinal wave, when the wave is close together, it is referred to as __________.

Answer 14

compression

This refers to the regions where particles are packed closely together.

Question 15

In a longitudinal wave, when the wave is spread apart, it is referred to as __________.

Answer 15

rarefaction

This refers to the regions where particles are spread apart.

Question 16

An ocean wave is a combination of which two types of waves?

Answer 16

• Transverse
• Longitudinal

Ocean waves travel at the surface of the water and move particles in a circular motion.

Question 17

What does wavelength measure in a wave?

Answer 17

The distance a wave travels

Wavelength can be measured differently for transverse and longitudinal waves.

Question 18

Transverse waves measure wavelength from __________ to __________.

Answer 18

crest to crest

This is the distance between two consecutive crests in a transverse wave.

Question 19

Longitudinal waves measure wavelength from __________ to __________.

Answer 19

compression to rarefaction

This is the distance between two consecutive compressions in a longitudinal wave.

Question 20

What is the unit of measurement for wavelength?

Answer 20

meters (m)

Wavelength is typically measured in meters.

Question 21

What does frequency measure in the context of waves?

Answer 21

The number of times a wave repeats in a given amount of time

Frequency is measured in Hertz (Hz).

Question 22

True or false: The more frequent a wave occurs, the shorter the wavelength.

Answer 22

TRUE

A wave with a low frequency will have a longer wavelength.

Question 23

A wave with a low frequency will have a __________ wavelength.

Answer 23

longer

This is due to the inverse relationship between frequency and wavelength.

Question 24

A sound wave is

Answer 24

Longitudinal

Question 25

What determines the **speed of a wave**?

Answer 25

The speed of a wave is determined by the distance of wave travels in a certain amount of time. Waves travel at different speed through different materials. ## Footnote Waves travel at different speeds in different materials.

Question 26

Fill in the blank: **Wave Speed = _______ x Frequency**.

Answer 26

Wavelength ## Footnote The formula for wave speed is V = h f, where V is wave speed in m/s.

Question 27

What do waves transmit from place to place?

Answer 27

Energy ## Footnote The amount of energy transmitted is determined by the energy input into the vibration.

Question 28

True or false: Faster vibrations transmit **more energy**.

Answer 28

TRUE ## Footnote Faster vibrations lead to greater energy transmission.

Question 29

What is the relationship between a wave's energy and its **frequency**?

Answer 29

Directly proportional ## Footnote When frequency doubles, the energy also doubles.

Question 30

A wave's energy is proportional to the **square of its amplitude**. What does this imply?

Answer 30

Higher amplitude results in more energy ## Footnote Amplitude is measured in Joules (J).

Question 31

If a wave has an amplitude of 3, what is its energy?

Answer 31

9 Joules ## Footnote Energy is calculated as the square of the amplitude (3^2 = 9J).