Heat & Light Flashcards

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1
Q

A measure of how hot an object is

A

temperature

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2
Q

The faster the molecules are moving, the ___________ the temperature

A

higher

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3
Q

The slower the molecules are moving, the ___________ the temperature

A

lower

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4
Q

Heat is the energy that’s inside an object because its __________ are moving

A

molecules

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5
Q

The more ___________ an object has, the more heat energy is has

A

molecules

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6
Q

Heat is the ________ that’s inside an object because its molecules are moving

A

energy

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7
Q

The more molecules an object has, the more heat ________ is has

A

energy

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8
Q

Heat tends to move from _________ objects to _________ objects

A

hotter - colder

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9
Q

Three ways heat is transferred

A

conduction, convection, radiation

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10
Q

The transfer of heat that occurs when a warmer object touches a cooler object

A

conduction

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11
Q

In conduction, the molecules in the cooler object start moving faster and the object gets __________.

A

warmer

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12
Q

What is an example of conduction?

A

A frying pan heating up on a stove

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13
Q

When heat moves with air flow

A

convection

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14
Q

When air is heated it ________. Eventually it ________ and comes back down.

A

rises - cools

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15
Q

Give an example of convection

A

lava lamp

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16
Q

The transfer of heat that occurs when an object gives off heat

A

radiation

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17
Q

In radiation, heat radiates _______ the warm object _______ its surroundings

A

from - to

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18
Q

Heat radiates from the _______ to the earth

A

sun

19
Q

_________ heat radiates into a room, so it’s warmer if you have more people in the room.

A

Body

20
Q

What makes good heat conductors because they transfer heat easily?

A

metal

21
Q

Good _________ hold in heat because it does not move through them easily.

A

insulators

22
Q

Name 3 examples of good insulators

A

wood, plastic, cloth

23
Q

When an object heats up, the molecules:

A. slow down and the object contracts.
B. speed up and the object expands.
C. don’t change.

A

B. speed up and the object expands.

24
Q

When an object cools, the molecules:

A. slow down and the object contracts.
B. speed up and the object expands.
C. don’t change.

A

A. slow down and the object contracts.

25
Q

_________ is part of the electromagnetic energy spectrum

A

Light

26
Q

What is the part of the electromagnetic spectrum that we can see?

A

visible light

27
Q

A particle of light

A

photon

28
Q

Light travels in _______

A

waves

29
Q

What occurs when light bends as it passes through something?

A

refraction

30
Q

What occurs when light bounces off an object?

A

reflection

31
Q

Give an example of reflection

A

mirror

32
Q

When light hits a prism, it __________, separating into seven colors that make up white light

A

refracts

33
Q

Name the colors (in order) of a prism

A

red, orange, yellow, green, blue, indigo, violet

34
Q

When light hits an object, some light is _________ and some light is ___________.

A

reflected - absorbed

35
Q

Which light do we see?

A

reflected

36
Q

Can we see light that is absorbed?

A

No

37
Q

What happens with a BLUE shirt?

A. It reflects blue
B. It absorbs all of the wavelengths of light
C. It reflects all of the spectrum of light

A

A. It reflects blue

38
Q

What happens with a BLACK shirt?

A. It reflects black
B. It absorbs all of the wavelengths of light
C. It reflects all of the spectrum of light

A

B. It absorbs all of the wavelengths of light

39
Q

What happens with a WHITE shirt?

A. It reflects white
B. It absorbs all of the wavelengths of light
C. It reflects all of the spectrum of light

A

C. It reflects all of the spectrum of light

40
Q

_________ mirrors curve inward

A

Concave

41
Q

___________ mirrors curve outward

A

Convex

42
Q

Which mirrors reflect light so that it is focused in one spot?

A

concave

43
Q

Images look LARGER in this type of mirror

A

concave

44
Q

Images look SMALLER in this type of mirror

A

convex