Unit 4 Test- Waves

Question 1

When a wave bounces off a medium?

Answer 1

Reflection

Question 2

When a wave passes through a medium unchanged?

Answer 2

Transmission

Question 3

A wave is transporting ___ from one place to another

Answer 3

Energy

Question 4

As the frequency of the wave increases the ____ decreases

Answer 4

Wavelength

Question 5

During ____ a wave transfers its energy into a medium

Answer 5

Absorption

Question 6

The texture of a surface can change how sound is ____

Answer 6

Reflected

Question 7

Some media can cause both sound and light waves to ____, or change direction

Answer 7

Refract

Question 8

Sound travels ____ through more dense media

Answer 8

Faster

Question 9

The ____ of a surface affects how light is reflected

Answer 9

Color

Question 10

A dimmer switch for a light is more similar to an ____ signal

Answer 10

Analog

Question 11

As the noise gets louder, the amplitude of the wave ____

Answer 11

Increases

Question 12

Light waves travel ____ through more dense media

Answer 12

Slower

Question 13

This is when a wave changes direction because of a new medium

Answer 13

Refraction

Question 14

An electromagnetic wave moves easily through this

Answer 14

Space

Question 15

When light reaches a very ___ medium it will be reflected or absorbed

Answer 15

Dense

Question 16

T/F: Both analog and digital signals can transmit information

Answer 16

True

Question 17

What is wavelength?

Answer 17

The distance between crests

Question 18

What is the crest?

Answer 18

The highest point in the wave

Question 19

What is the trough?

Answer 19

The lowest point in the wave

Question 20

What is amplitude?

Answer 20

The distance each wave goes up or down from the starting point

Question 21

What changes pitch?

Answer 21

Wavelength. Lower wavelength, higher pitch, etc.

Question 22

What changes brightness?

Answer 22

Amplitude. Higher amplitude, higher brightness, etc.