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Science > Ch. 12 > Flashcards

Ch. 12 Flashcards

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1
Q

Energy

A

Ability to do work or cause a change.

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2
Q

Changes energy can cause in an object:

A

motion, color, shape and temperature.

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3
Q

Energy cannot be created or destroyed, it just:

A

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

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4
Q

Potential Energy:

A

Stored energy.

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5
Q

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

A

Potential energy.

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6
Q

Kinetic Energy:

A

Energy of motion.

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7
Q

Kinetic Energy depends on ______and_____.

A

Speed and Mass

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8
Q

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

A

more

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9
Q

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

A

more

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10
Q

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

A

Car 1

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11
Q

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

A

A basketball

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12
Q

Mechanical Energy

A

The total of all the Kinetic energy and Potential energy.

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13
Q

When you put batteries into a flashlight:

A

Chemical energy becomes light energy.

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14
Q

when you plug in a toaster and turn it on:

A

Electrical energy becomes heat and light energy.

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15
Q

Sound

A

a wave of vibrations.

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16
Q

Vibrating ______ are needed for sound to exist.

A

particles.

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17
Q

Vibration

A

back and forth motion of particles

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18
Q

Sound waves move in ____ directions.

A

all

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19
Q

Sound can travel through:

A

solids, liquids, and gases.

20
Q

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

A

fastest, slowest.

21
Q

Sound can NOT travel in a _________.

A

vacuum (empty space without air - outer space).

22
Q

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

A

speed.

23
Q

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

A

transmitted

24
Q

Sound can be ________, bounced back - echo.

A

reflected

25
Q

Sound can be ________, taken in, sucked up.

A

absorbed

26
Q

Pitch

A

the height of the tone

27
Q

Frequency

A

how often particles are vibrating.

28
Q

The faster the vibration the _______ the frequency.

A

higher

29
Q

The greater the frequency, the ________the pitch.

A

higher

30
Q

The slower the frequency, the _______the pitch.

A

lower

31
Q

Volume

A

Loudness

32
Q

The more energy, the ________ the sound.

A

louder (higher volume).

33
Q

Higher volume (louder sound) from:

A

being closer to the source, or having more vibrations.

34
Q

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

A

eardrum

35
Q

The _______ will interpret the sound.

A

brain

36
Q

Light

A

a _________ of vibration.

37
Q

Light travels in a _________ line.

A

straight

38
Q

Light travels _________ than sound.

A

faster.

39
Q

Speed of light

A

186,000 mps

40
Q

Speed of sound

A

3,521 mps

41
Q

Light can pass through some materials and not others.

A

True.

42
Q

Transparent

A

Almost all light waves pass through.

43
Q

Give an example of something that is transparent.

A

window

44
Q

Translucent

A

Some light waves pass through.

45
Q

Give examples of some things that are translucent.

A

Stain glass window, wax paper, lamp shades.

46
Q

Opaque

A

No light waves pass through.

47
Q

Give example of some things that are opaque.

A

Walls, chairs, wood.

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