Waves And More Waves

Question 1

What are the two things that allow waves to occur?

Answer 1

1-matter

2-energy

Question 2

What is matter?

Answer 2

Anything that has a weight and that takes space.

Question 3

What is energy?

Answer 3

The ability to do work.

Question 4

What would happen if we didn’t have energy?

Answer 4

There would be no movement within the system.

Question 5

True or false.

Energy has no mass.

Answer 5

True.

Question 6

Name 2 ways energy can move mass.

Answer 6

1-2 objects collide

2-objects vibrate and produce waves

Question 7

What’s a vibration?

Answer 7

Continuous motion that disturbs it’s environment.

Question 8

What is a wave?

Answer 8

A disturbance created by vibrations.

Question 9

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

Answer 9

energy

Question 10

What are mechanical waves?

Answer 10

Waves that travel through matter.

Question 11

Where do mechanical waves pass through?

Answer 11

Different materials or media.

Question 12

What do mechanical waves create?

Answer 12

Disturbances in the medium.

Question 13

Name all the waves. (3 types)

Answer 13

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

Question 14

Water waves travel through what?

Answer 14

Water.

Question 15

Sound waves travel through what?

Answer 15

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

Question 16

Waves cause the medium to do what?

Answer 16

Vibrate back and forth.

Question 17

How is the speed of sound determined?

Answer 17

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

Question 18

The closer the particles, the faster the _______ travels.

Answer 18

Sound.

Question 19

What is the amp?

Answer 19

Amp= 1/2 the wave length.

Question 20

Higher frequency= ______ _______

Answer 20

High pitched.

Question 21

What is the wave height?

Answer 21

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

Question 22

What is the wave length?

Answer 22

The distance between the tops of two waves.

Question 23

What is the measurement of frequency?

Answer 23

Hertz (Hz)

Hz=one wave per second

Question 24

Sound must be produced by a source…. give a “formula” to understand this.

Answer 24

No matter=no particles to push against=no sound

Question 25

How fast does sound travel?

Answer 25

It travels at different speeds.

Question 26

Sound travels faster through_______ than air.

Answer 26

Solids.

Question 27

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

Answer 27

Surfaces.

Question 28

What is an echo?

Answer 28

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

Question 29

How are bats and echoes related?

Answer 29

Echolocation: bats produce high frequency ultrasonic sound waves.

Question 30

Name 2 reasons why bats use echolocation.

Answer 30

1-to locate obstacles in the dark

2-to locate prey