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Science 7th > Midterm > Flashcards

Midterm Flashcards

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1
Q

Qualitative

A

quality

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2
Q

Quantitative

A

quantity (amount)

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3
Q

Five senses

A

sight, sound, touch, taste, hear

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4
Q

Inferences

A

An explanation for observations you have made

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5
Q

How do you figure out density

A

Divide mass by volume

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6
Q

Density

A

How dense something is. Density of water is one, so if it is over one, it will sink. If it is under one, it will float. Function of mass and volume. For liquids, read the volume, find mass and divide. For solids, use length x width x height then find mass and divide.

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7
Q

Would you use killograms, decagrams, grams or milligrams to measure

A

An elephant? a text book? A crayon? A desk

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8
Q

Volume

A

the amount of space an object occupies

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9
Q

Water is a compound, mixture or element

A

Compound

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10
Q

Which of the following is a mixture and why

A

Hydrogen (H); water (H20), salt water (NaCl and H20) or Sugar (C6H12O6)

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11
Q

prefixes

A

King (kilo) Henry (hecto) Died (deca) By (base) Drinking (deci) Chocolate (centi) Milk (mili)

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12
Q

Name some class safety rules

A 
Use glassware safely
No drinking chemicals
Report incidents to teacher
Wear safety goggles
Don't reach across a flame
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13
Q

Mass is the amount of blank in an object

A

matter

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14
Q

Volume is the amount of blank in an object

A

space

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15
Q

Metric length is the blank from one point to another

A

distance

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16
Q

Would you measure volume using a graduated cylinder,, triple beam balance or metric ruler

A

graduated cylinder

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17
Q

When reading from a meniscus for liquid volume read from the

A

bottom of the curve

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18
Q

Scientific method order

A

question, hypothesis, experiment, analysis, conclusion

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19
Q

examples of metals

A

titanium, gold, silver

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20
Q

what is a semi conductor

A

between a metal and a non-metal

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21
Q

What is an important property of a metal

A

conducts electricity

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22
Q

Is carbon a metal or non metal

A

non metal

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23
Q

elements

A

Capital or capital and lowercase letters Cannot be separated physically or chemically

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24
Q

compounds

A

two or more capitals can only be separated chemically

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25
Q

electrolysis

A

hydrogen separated from oxygen

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26
Q

mixtures

A

two or more elements or compounds not chemically combined. Can only be separated physically

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27
Q

melting

A

solid turning into a liquid

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28
Q

freezing

A

a liquid turning to a solid (32)

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29
Q

evaporation

A

liquid turns to gas

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30
Q

condensation

A

steam turning into a liquid

31
Q

air mass

A

huge body of air that has similar temperature, humidity and air pressure

32
Q

four types of air masses and description

A

tropical (warm air masses that form in the tropics and have low air pressure)
polar (cold air masses that form north of 50 degree north latitude and south of 50 degrees south latitude and have high air pressure)
maritime (form over oceans and are humid)
continental (air masses form over land, are in the middle of continents and are dry)

33
Q

four types of air masses in North America

A 
maritime tropical (warm humid air from the Gulf of Mexico to the Eastern U.S. or warm humid air from the Pacific Ocean to the West Coast). 
Continental tropical (tropical air mass from Southwest brings hot, dry air to the southern Great Plains). 
maritime polar (Air masses from North Atlantic Ocean are often pushed out by sea to westerly winds)
Continental polar (Air masses from central and northern Canada bring cold air to the central and eastern U.S.)
34
Q

four types of fronts

A 
cold front (cold air moves underneath warm air forcing warm air to rise)
warm front (forms when warm air moves over cold air. Moves slowly, bringing warm humid air
Stationary front (forms when cold and warm air masses meet by neither has enough force to move the other. May bring days of clouds and precipitation)
Occluded front (warmer air mass caught between two cooler air masses)
35
Q

font

A

area where air masses meet and do not mix

36
Q

cyclone

A

swirling center of low air pressure. Also called lows.

37
Q

in addition to mass, air also has properties including

A

density and pressure

38
Q

pressure

A

force per unit area

39
Q

air pressure

A

the result of the weight of a column of air pushing down on an area. they push in all directions, which is why objects aren’t crushed.

40
Q

falling air pressure means

A

storm is a approaching

41
Q

rising air pressure means

A

weather is clearing

42
Q

barometer

A

instrument that measures air pressure.

43
Q

what are the two kinds of barometers

A

mercury (filled with mercury and open at one end). air pressure pushing down on surface of mercury is equal to weight of the column of mercury in the tube
aneroid (airtight metal chamber sensitive to air pressure)

44
Q

altitude or elevation

A

distance above sea level. Air pressure decreases as altitude increases. Air pressure increases and so does density

45
Q

chemical change

A

new substance created

46
Q

physical change

A

substance remains the same

47
Q

what are the four phase changes

A

melting, freezing, vaporization and condensation

48
Q

Building blocks of molecules are called

A

Atoms

49
Q

Sub atomic particles

A

Neutrons, protons and electrons

50
Q

electrons

A

negatively charged particles outside the nucleus and no mass

51
Q

protons

A

positive and in the nucleus and have 1 atomic mass unit

52
Q

neutrons

A

neutral and in the nucleus and have 1 atomic mass unit

53
Q

three phases of matter

A

solid, liquid, gas

54
Q

what does adding heat energy to particles make them do

A

move apart and move faster

55
Q

solid

A

particles very close together

56
Q

liquid

A

particles are a little bit spread out

57
Q

gas

A

particles very spread out from each other

58
Q

when heat or energy is added to a solid,

A

particles move faster and spread out

59
Q

CO is a ___________

A

2 capital letters. 2 elements.

60
Q

SR is a __________

A

second letter is lower case

61
Q

Periodic table has metals on the

A

left of the zig zag line

62
Q

atmosphere

A

many layers with different temperature, pressure and altitude

63
Q

air pressures

A

decreases as you go higher in altitude

64
Q

high pressure

A

clear skies

65
Q

low pressure

A

cloudy skies, rainy weather

66
Q

rain gauge

A

collects precipitation

67
Q

anemometer

A

measures wind speed

68
Q

wind vane

A

measures wind direction

69
Q

weather satellites

A

send info to computers on the weather

70
Q

psychrometer

A

measures humidity

71
Q

hygrometer

A

measures humidity

72
Q

local winds

A

sea and land breezes. Smaller and occur from uneven heating in local areas

73
Q

global winds

A

large bodies of air that heat

Science 7th (3 decks)

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