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Energy Test Flashcards

1
Q

electromagnetic energy

A

energy which travles through space in waves
ex- infared, ultraviolet, gamma rays, x rays, micro-waves, visible light, radio waves

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2
Q

difference among EME is

A

their wavelength

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3
Q

kinetic energy

A

energy of motion
faster= more KE
slower= less KE

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4
Q

potential energy

A

stored energy of position
higher= more PE
lower= less PE

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5
Q

conduction

A

heat flow in a solid by collsions of molecules

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6
Q

heat source

A

high energy

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7
Q

heat sink

A

low energy

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8
Q

heat always flows from a

A

source to a sink

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9
Q

adding cold is

A

impossible

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10
Q

bigger temp diference =

A

faster heat flow

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11
Q

closed energy system

A

no heat

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12
Q

heat lost at source=

A

heat gained a sink

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13
Q

specific heat

A

a physical property of all materials. shows how quickly a substance will change temperature

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14
Q

heating and cooling is when

A

a substance absorbs or radiates heat energy

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15
Q

the lower the specific heat

A

the bigger the change in temperature ( heating)

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16
Q

the higher the specific heat

A

the smaller change in temperature ( heating and cooling)

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17
Q

low specific heat

A

heats and cools quickly

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18
Q

high specific heat

A

heats and cools slowly

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19
Q

liquid water has the

A

highest specific heat of any substance

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20
Q

energy absorbed

A

energy is ¨soaked in” at the surface when this happens temp goes up

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21
Q

energy reflected

A

bounces off the surface not absorbed
temp stays the same

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22
Q

a good absorber

A

dark,dull, rough

23
Q

good radiator

A

good absorber

24
Q

good reflector

A

light, shiny smooth

25
Q

alepedo

A

reflected energy from a surface

26
Q

change in state

A

no change in temp

27
Q

melt

A

add 334 J/g

28
Q

freeze

A

remove 334 J/g

29
Q

vaporize

A

add 2260 J/g

30
Q

condense

A

remove 2260 J/g

31
Q

convection

A

heat flow in a gas or liquid caused by a difference in density

32
Q

hot

A

less dense, rises

33
Q

cold

A

more dense, sinks

34
Q

what is true about electromagnetic energy

A

gamma rays have a shorter wavelength than visible light

35
Q

what color has the shortest wavelength

A

violet

36
Q

what form of electromagnetic energy has the longest wavelength

A

radio waves

37
Q

list the forms of electromagnetic enerrgy in longest to shortest wavelength

A

radio waves, infared rays, visible light, ultra violet rays

38
Q

basic difference among ultraviolet visible and infared radiation

A

wavelength

39
Q

as the temp of an object approaches absolute zero the amount of electromagnetic energy radiated will

A

decrease

40
Q

which energy transformation occurs as rock falls freely from the top of a vertical cliff

A

the rocks potential energy and kinetic energy decrease

41
Q

which forms of em energy causes skin cancer

A

ultraviolet

42
Q

which of these forms of em energy is the same as heat energy

A

infared

43
Q

during which phase change does water release the most heat energy

A

condensation

44
Q

which process absorbs 334 joules of energy for each gram of water

A

melting

45
Q

which statement best describes the pattern of energy flow in a closed system

A

energy flows from energy sources to energy sinks

46
Q

which type of land surface has the highest albedo

A

light, colored, shiny , smooth

47
Q

an object that is a good absorber of electromagnetic energy is also a good

A

radiator of electromagnetic energy

48
Q

by which process is heat energy transfered when molecules within a substance collide

A

conduction

49
Q

which phase change requires water to gain 2260 joules per gram

A

liquid water vaporizing

50
Q

land surfaces of earth hear more rapidly than water surfaces because

A

land has a higher specific heat than water

51
Q

when snow is melting the temperature of snow will

A

remain the same

52
Q

which earth surface usually reflects the most incoming solar radiation

A

snow cover

53
Q
A

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