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Physical Science > PS Quarterly Exam > Flashcards

PS Quarterly Exam Flashcards

1
Q

Atom

A

The smallest chemical unit of matter

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2
Q

Molecule

A

Two or more atoms linked together to form a substance with unique properties

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3
Q

Concentration

A

The quality of a substance within a certain volume

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4
Q

If something can be broken down, is it an atom or a molecule?

A

Molecule

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5
Q

Molecules have…

A

Unique properties

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6
Q

Hydroxycarbonate colors things…

A

greenish-blue

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7
Q

Have scientists seen atoms?

A

no

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8
Q

centi

A

0.01

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9
Q

milli

A

0.001

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10
Q

kilo

A

1000

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11
Q

English unit for mass

A

slug

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12
Q

Metric unit for mass

A

gram

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13
Q

Metric unit for volume

A

liter

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14
Q

English unit for volume

A

gallon

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15
Q

Metric unit for length

A

meter

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16
Q

English unit for length

A

foot

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17
Q

Humidity

A

The moisture content of air

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18
Q

Absolute Humidity

A

The mass of water vapor contained in a certain volume

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19
Q

Relative Humidity

A

The ratio of the mass of water vapor in the air at a given temperature to the maximum mass of water vapor the air could hold at that temperature expressed as a percentage

20
Q

Greenhouse effect

A

The process by which certain gases trap heat that radiates from earth

21
Q

Parts per million

A

The number of molecules or atoms of a substance in a mixture for every one million molecules or atoms in that mixture

22
Q

Why does sweating cool you down?

A

Because the water evaporates off your skin and takes energy from your skin in the form of heat

23
Q

What is the percentage of nitrogen in dry air?

A

78%

24
Q

What is the percentage of oxygen in dry air?

A

21%

25
Q

What makes up the majority of the air we exhale?

A

nitrogen

26
Q

Do we exhale more carbon dioxide or oxygen?

A

oxygen

27
Q

10,000 ppm

A

1 %

28
Q

Cost/benefit analysis-

A

To see if the benefit is worth the cost

29
Q

Atmosphere

A

The mass of air surrounding a planet

30
Q

Barometer

A

An instrument used to measure atmospheric pressure

31
Q

Homosphere

A

The lower layer of the earth’s atmosphere

32
Q

Heterosphere

A

The upper layer of the earth’s atmosphere

33
Q

Jet streams

A

Narrow bands of high speed winds that circle the earth

34
Q

Heat

A

Energy that is transferred as a consequence of temperature differences

35
Q

Temperature

A

The measure of the energy of random motion in a substances molecules

36
Q

troposphere

A

weather layer

37
Q

stratosphere

A

ozone layer

38
Q

homosphere=

A

troposphere, stratosphere, and mesosphere

39
Q

heterosphere=

A

thermosphere and exosphere

40
Q

Electrolysis

A

The use of electricity to break a molecule down into smaller units

41
Q

Polar molecule

A

A molecule that has slight positive and negative charges due to an imbalance in the way electrons are shared

42
Q

Solvent

A

A liquid substance capable of dissolving other substances

43
Q

Solute

A

A substance that is dissolved in a solvent

44
Q

Cohesion

A

Individual molecules are so strongly attracted to each other they tend to stay together, even when exposed to tension

45
Q

Hard water

A

Water that has certain dissolved ions in it - predominately calcium and magnesium ions

46
Q

Why water liquid?

A

Hydrogen bonding

Physical Science (8 decks)

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