Waves

Question 1

What are the two things that allow waves to occur?

Answer 1

1-matter

2-energy

Question 2

True or false.

Energy has no mass.

Answer 2

True.

Question 3

What’s a vibration?

Answer 3

Continuous motion that disturbs it’s environment.

Question 4

What is a wave?

Answer 4

A disturbance created by vibrations.

Question 5

Waves can move _________(but not matter) through space.

Answer 5

energy

Question 6

What are mechanical waves?

Answer 6

Waves that travel through matter.

Question 7

Name all the waves. (3 types)

Answer 7

1-sound waves
2-water waves
3-earthquake waves

Question 8

Water waves travel through what?

Answer 8

Water.

Question 9

Sound waves travel through what?

Answer 9

Any state of matter,( liquids, solids, and gases)

Question 10

Waves cause the medium to do what?

Answer 10

Vibrate back and forth.

Question 11

How is the speed of sound determined?

Answer 11

It’s determined by how densely packed the particles are in the medium.

Question 12

The closer the particles, the faster the _______ travels.

Answer 12

Sound

Question 13

What is the amp?

Answer 13

Amp= 1/2 the wave length.

Question 14

Higher frequency= ______ _______

Answer 14

High pitched.

Question 15

What is the wave height?

Answer 15

The vertical distance between the top and bottom of the wave.

Question 16

What is the wave length?

Answer 16

The distance between the tops of two waves.

Question 17

What is the measurement of frequency?

Answer 17

Hertz (Hz)

Hz=one wave per second

Question 18

Sound travels faster through_______ than air.

Answer 18

Solids.

Question 19

Sound is reflected by hard smooth ________ and is absorbed by carpets and curtains.

Answer 19

Surfaces.

Question 20

What is an echo?

Answer 20

It’s a reflected sound that arrives 1/10 of a second after the original sound.

Question 21

How are bats and echoes related?

Answer 21

Echolocation: bats produce high frequency ultrasonic sound waves.

Question 22

Name 2 reasons why bats use echolocation.

Answer 22

1-to locate obstacles in the dark

2-to locate prey