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Grade 7 Finals > Science Final > Flashcards

Science Final Flashcards

1
Q

Solid

A

Rigid, fixed shape, fixed volume, can’t be squashed

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2
Q

Liquid

A

Not rigid, no fixed shape, fixed volume, can’t be squashed

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3
Q

Gas

A

Not rigid, no fixed shape, no fixed volume, can be squashed

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4
Q

Thermocouple

A

2 metals twisted together
When heated electric current is generated
Electric current could be used to turn on a switch

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5
Q

Bimetallic strip

A

Iron and copper
If gets cold one side coils and one side expands
If gets hot process is reversed
EX) Refrigerators, air conditioning

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6
Q

Recording thermometer

A

Like seismogram but temperature

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7
Q

Infrared thermogram

A

Detects anything above absolute zero

The color or brightness of the image shows the temperature of the object

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8
Q

Melting

A

Solid to liquid

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9
Q

Freezing

A

Liquid to solid

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10
Q

Evaporation

A

Liquid to gas

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11
Q

Condensation

A

Gas to liquid

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12
Q

Sublimation

A

Solid to gas

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13
Q

Sublimation

A

Gas to solid

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14
Q

Room Temperature

A

20-25 degrees

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15
Q

Body Temperature

A

37 degrees

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16
Q

Coffee

A

55 degrees

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17
Q

Boiling Point

A

100 degrees at sea level

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18
Q

Freezing

A

0 degrees

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19
Q

Radiation

A

Transferring heat through waves or rays

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20
Q

Conduction

A

Transferring heat through touch

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21
Q

Convection

A

Transferring heat through fluids (liquid and gas)

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22
Q

By-product of thermal energy

A

Sulfur dioxide, carbon monoxide, carbon dioxide

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23
Q

Chemical Energy

A

When burned can produce large amounts of thermal energy EX: Wood or coal

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24
Q

Electrical Energy

A

Hydroelectric dams use energy from falling water to produce electrical power

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25
Q

Mechanical Energy

A

Forces that push or pull objects often release thermal energy (friction) EX: Car brakes

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26
Q

Geothermal Energy

A

Natural source of thermal energy from the Earth. Can be harnessed to produce electrical energy

27
Q

Solar Energy

A

Only energy that never runs out. Clean source.

28
Q

Passive Solar Energy

A

Greenhouse. Uses materials to absorb and create heat

29
Q

Active Solar Energy

A

Uses solar collectors along with fans to distribute stored thermal energy

30
Q

Wind

A

The energy of the moving air

31
Q

Nucular

A

Energy required to split atoms. Massive amounts of energy released

32
Q

Shell Structure

A

Thin, carefully shaped outer layer of material to provide strength and rigidity. They are completely empty.
EX: Eggshells, parachutes

33
Q

Mass Structure

A

Forming similar materials into particular shape or design. EX: Dams, brick walls

34
Q

Frame Structure

A

Made with a skeleton (Frame) of very strong material that is used to carry weight of a roof and covering material
EX: A human body, house, Biocycle

35
Q

Aesthetics

A

How it looks. Has to look good

36
Q

Margin Safety

A

When a structure can support many more times more its weight

37
Q

Mobile Joint

A

Can move. EX: Door hinges

38
Q

Rigid Joint

A

Does not move. EX: chair legs

39
Q

Mass

A

The amount of matter in a substance

40
Q

Weight

A

The force of gravity exerted on the mass

41
Q

Tension Force

A

Pulling. Two forces acting in opposite directions

42
Q

Compression Force

A

Pressing. Crush a material by pressing it together

43
Q

Shear Force

A

Bend/Tear. Bend/tear a material by pressing different parts in opposite directions

44
Q

Torsion Force

A

Twist. Twist a material by turning the ends in opposite directions

45
Q

Friction

A

A force that resists movement between two surfaces that rub together

46
Q

Shear compression

A

One section of land may slide over another section along a weakness/crack

47
Q

Bend/buckle compression

A

A can is being crushed (compression) and being pushed inward (bend/buckle)

48
Q

Shear torsion

A

Often materials will shear when they are twisted

49
Q

Roots

A

Anchor plant
Absorb water and minerals from the soil
Store food to help plants survive during times of scarcity

50
Q

Diffusion

A

Particles in a moving gas or a liquid to become evenly distributed by moving from areas of greater concentration to areas of lesser concentration

51
Q

Osmosis

A

The movement or diffusion of water through differentially permeable membranes

52
Q

Differentially Permeable

A

Some materials pass through and other materials are kept out

53
Q

STEMS

A

Transport water and nutrients to the rest of the plant
Support the leaves and to ensure that they receive adequate light
Food storage

54
Q

Anther

A

Where pollen is produced and stored

55
Q

Filament

A

Stalk that supports anther

56
Q

Stigma

A

Sticky lip of the pistil that captures pollan grains

57
Q

Style

A

Stalk that supports stigma

58
Q

Ovary

A

Swollen base of pistil containing ovules

59
Q

Ovules

A

Sacs containing female reproduction cells

60
Q

Sexual Reproduction

A

Involves the production of seeds and fruits

61
Q

Asexual Reproduction

A

The parent plant grows new plant roots, stems or leaves. Only involves one plant

62
Q

Grafting

A

Taking a branch from one tree and attach it to the other. This guarantees that the new plant will be the same as the parent plant

63
Q

Selective Breeding

A

People will choose specific characteristics and encourage plant these to reproduce

Grade 7 Finals (2 decks)

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