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Science > Last Science Test Year 7 Definitions > Flashcards

Last Science Test Year 7 Definitions Flashcards

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Biology 101 flashcards
1
Q

Agents of erosion

A

Water, wind, ice

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2
Q

Atmosphere

A

Layer of gases above the earth’s surface

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3
Q

Deposition

A

When sediments drop out of water, air or ice

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4
Q

Erosion

A

The movement of sediments away from the place of their formation or deposition

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5
Q

Humus

A

Decaying plants and animals, and their waste

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6
Q

Igneous rock

A

Rock formed by the cooling of molten rock (lava)

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7
Q

Minerals

A

Substances formed in rocks

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8
Q

Non-renewable resource

A

A resource that takes longer than the average human lifespan to be replaced

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9
Q

Photosynthesis

A

The process by which plants use carbon dioxide, water and sunlight to make food

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10
Q

Renewable resource

A

A resource that is always being replaced naturally

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11
Q

Resource

A

Something that satisfies a particular purpose or need

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12
Q

Sediment

A

Material such as silt and sand that is transported and deposited by water, ice and wind, and forms layers on the Earth’s surface. In time it can be compacted to form a sedimentary rock

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13
Q

Sedimentary rock

A

Rock formed by compacting and sticking together of sediments

E.g. Sandstone

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14
Q

Weathering

A

The process of breaking down rocks into smaller pieces

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15
Q

Fossil fuels

A

Fuels such as natural gas, oil and coal, formed from the remains of living things buried millions of years ago.

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16
Q

Hydroelectricity

A

The process of using water falling from a height to turn turbines and generate electricity

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17
Q

Solar cell

A

A device that absorbs solar energy and converts it directly into electrical energy

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18
Q

Aquifer

A

I layer of pervious pervious rock from which water can be extracted using a bore or well.

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19
Q

Groundwater

A

Water that exists underground

20
Q

Humidity

A

The amount of water vapour in the air

21
Q

Impervious rock

A

Rock that does not allow water to soak into it

22
Q

Percolation

A

The process of water soaking into the soil

23
Q

Pervious rock

A

Rock that allows water to soak into it

24
Q

Run-off

A

Rainwater nor absorbed by the soil

25
Q

Saturated

A

Not able to hold any more water vapour

26
Q

Transpiration

A

The evaporation of water from plants

27
Q

Water cycle

A

The natural process of recycling water

28
Q

Irrigation

A

A practice used in agriculture that provides water to crops using pipes and ditches

29
Q

Springs

A

Places where underground water comes to the surface

30
Q

Astronomy

A

The scientific study of stars, planets and other celestial objects

31
Q

Astrology

A

The belief that the position of various celestial objects can directly affect the events of a person’s life

32
Q

Milky Way

A

The galaxy in which the solar system is located.

33
Q

Terrestrial

A

Earth-like, rocky.

The terrestrial planets are Mercury, Venus, earth and mars

34
Q

Artificial satellites

A

Satellites placed into orbit by humans

35
Q

Geocentric model

A

The model where EARTH is the centre

36
Q

Heliocentric model

A

The model where THE SUN is the centre

37
Q

Gravity

A

Force of attraction between masses

38
Q

Lunar eclipse

A

When the earth stops sunlight from reaching the moon

39
Q

Solar eclipse

A

When the moon blocks sunlight from reaching the earth

40
Q

Satellite

A

A mass in orbit around another mass.

41
Q

Orbit

A

Path a planet takes around a star, or a moon or satellite takes around a planet

42
Q

Phases of the moon

A

Different shapes of the moon as seen from earth

43
Q

Axis

A

The line connecting the North Pole with e South Pole. The earth rotates around this axis

44
Q

Day

A

The time a planet takes to rotate once completely on its own axis

45
Q

Revolution

A

One complete orbit around the sun

46
Q

Year

A

The time a planet takes

Science (2 decks)

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