Ch. 12

Question 1

Energy

Answer 1

Ability to do work or cause a change.

Question 2

Changes energy can cause in an object:

Answer 2

motion, color, shape and temperature.

Question 3

Energy cannot be created or destroyed, it just:

Answer 3

transforms from one type of energy to another type of energy.

Question 4

Potential Energy:

Answer 4

Stored energy.

Question 5

Energy that is not causing any changes now, but could causes changes in the future is called:

Answer 5

Potential energy.

Question 6

Kinetic Energy:

Answer 6

Energy of motion.

Question 7

Kinetic Energy depends on ______and_____.

Answer 7

Speed and Mass

Question 8

The faster the object moves, the _____ kinetic energy it has.

Answer 8

more

Question 9

The more mass an object has, the ____kinetic energy it has.

Answer 9

more

Question 10

Which has more kinetic energy: Car 1 moving at 60mph, or car 2 moving at 30 mph

Answer 10

Car 1

Question 11

Which has more kinetic energy: A basketball or a feather?

Answer 11

A basketball

Question 12

Mechanical Energy

Answer 12

The total of all the Kinetic energy and Potential energy.

Question 13

When you put batteries into a flashlight:

Answer 13

Chemical energy becomes light energy.

Question 14

when you plug in a toaster and turn it on:

Answer 14

Electrical energy becomes heat and light energy.

Question 15

Sound

Answer 15

a wave of vibrations.

Question 16

Vibrating ______ are needed for sound to exist.

Answer 16

particles.

Question 17

Vibration

Answer 17

back and forth motion of particles

Question 18

Sound waves move in ____ directions.

Answer 18

all

Question 19

Sound can travel through:

Answer 19

solids, liquids, and gases.

Question 20

Sound travels________ in a solid, and ______ in a gas.

Answer 20

fastest, slowest.

Question 21

Sound can NOT travel in a _________.

Answer 21

vacuum (empty space without air - outer space).

Question 22

When sound moves from one medium to another, the _______ changes.

Answer 22

speed.

Question 23

Sound can be ___________, moved from one place to the next.

Answer 23

transmitted

Question 24

Sound can be ________, bounced back - echo.

Answer 24

reflected

Question 25

Sound can be ________, taken in, sucked up.

Answer 25

absorbed

Question 26

Pitch

Answer 26

the height of the tone

Question 27

Frequency

Answer 27

how often particles are vibrating.

Question 28

The faster the vibration the _______ the frequency.

Answer 28

higher

Question 29

The greater the frequency, the ________the pitch.

Answer 29

higher

Question 30

The slower the frequency, the _______the pitch.

Answer 30

lower

Question 31

Volume

Answer 31

Loudness

Question 32

The more energy, the ________ the sound.

Answer 32

louder (higher volume).

Question 33

Higher volume (louder sound) from:

Answer 33

being closer to the source, or having more vibrations.

Question 34

Once the waves reach your ear, the ________ will absorb the energy and vibrate.

Answer 34

eardrum

Question 35

The _______ will interpret the sound.

Answer 35

brain

Question 36

Light

Answer 36

a _________ of vibration.

Question 37

Light travels in a _________ line.

Answer 37

straight

Question 38

Light travels _________ than sound.

Answer 38

faster.

Question 39

Speed of light

Answer 39

186,000 mps

Question 40

Speed of sound

Answer 40

3,521 mps

Question 41

Light can pass through some materials and not others.

Answer 41

True.

Question 42

Transparent

Answer 42

Almost all light waves pass through.

Question 43

Give an example of something that is transparent.

Answer 43

window

Question 44

Translucent

Answer 44

Some light waves pass through.

Question 45

Give examples of some things that are translucent.

Answer 45

Stain glass window, wax paper, lamp shades.

Question 46

Opaque

Answer 46

No light waves pass through.

Question 47

Give example of some things that are opaque.

Answer 47

Walls, chairs, wood.