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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
Mechanical Energy
Forces that push or pull objects often release thermal energy (friction) EX: Car brakes
26
Geothermal Energy
Natural source of thermal energy from the Earth. Can be harnessed to produce electrical energy
27
Solar Energy
Only energy that never runs out. Clean source.
28
Passive Solar Energy
Greenhouse. Uses materials to absorb and create heat
29
Active Solar Energy
Uses solar collectors along with fans to distribute stored thermal energy
30
Wind
The energy of the moving air
31
Nucular
Energy required to split atoms. Massive amounts of energy released
32
Shell Structure
Thin, carefully shaped outer layer of material to provide strength and rigidity. They are completely empty. EX: Eggshells, parachutes
33
Mass Structure
Forming similar materials into particular shape or design. EX: Dams, brick walls
34
Frame Structure
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
Aesthetics
How it looks. Has to look good
36
Margin Safety
When a structure can support many more times more its weight
37
Mobile Joint
Can move. EX: Door hinges
38
Rigid Joint
Does not move. EX: chair legs
39
Mass
The amount of matter in a substance
40
Weight
The force of gravity exerted on the mass
41
Tension Force
Pulling. Two forces acting in opposite directions
42
Compression Force
Pressing. Crush a material by pressing it together
43
Shear Force
Bend/Tear. Bend/tear a material by pressing different parts in opposite directions
44
Torsion Force
Twist. Twist a material by turning the ends in opposite directions
45
Friction
A force that resists movement between two surfaces that rub together
46
Shear compression
One section of land may slide over another section along a weakness/crack
47
Bend/buckle compression
A can is being crushed (compression) and being pushed inward (bend/buckle)
48
Shear torsion
Often materials will shear when they are twisted
49
Roots
Anchor plant Absorb water and minerals from the soil Store food to help plants survive during times of scarcity
50
Diffusion
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
Osmosis
The movement or diffusion of water through differentially permeable membranes
52
Differentially Permeable
Some materials pass through and other materials are kept out
53
STEMS
Transport water and nutrients to the rest of the plant Support the leaves and to ensure that they receive adequate light Food storage
54
Anther
Where pollen is produced and stored
55
Filament
Stalk that supports anther
56
Stigma
Sticky lip of the pistil that captures pollan grains
57
Style
Stalk that supports stigma
58
Ovary
Swollen base of pistil containing ovules
59
Ovules
Sacs containing female reproduction cells
60
Sexual Reproduction
Involves the production of seeds and fruits
61
Asexual Reproduction
The parent plant grows new plant roots, stems or leaves. Only involves one plant
62
Grafting
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
Selective Breeding
People will choose specific characteristics and encourage plant these to reproduce

Grade 7 Finals (2 decks)

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