Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science year 8 > Topic 9 rocks > Flashcards

Topic 9 rocks Flashcards

1
Q

Minerals

A

Substances that makes up rocks. It is obtained by mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Lithosphere

A

The outer part of the earth consisting of the crust and upper mantle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Magma

A

A boiling mixture containing molten rock and gases. It is found just below the earths surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Sediments

A

Mineral or organic matter deposited by water, air, or ice.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Native elements

A

Elements found uncombined in the earths crust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Crystal

A

A clear, transparent mineral or glass resembling ice

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Lustre

A

A mineral that describes the way that it reflects light. It is described as glassy or brilliant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Streak

A

The powdery mark left in a mineral by scraping it on a hard surface like a white ceramic tile

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Hardness

A

A measure of how difficult it is to scratch the surface of a solid material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Igneous rocks

A

Rocks that form from hot magma “lava” being cooled down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Extrusive rocks

A

Rocks that solidify above ground from lava

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Pumice

A

A igneous rock that is used for cleaning and is one of the only rocks that can float

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Scoria

A

A dark igneous rock that solidifys from lava that cools quickly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Abrasive

A

A property of a material or substance that easily scratches another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Basalt

A

Igneous rock sometimes formed in water, sometimes has holes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Obsidian

A

Black rock with extremely high lustre, smooth shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Intrusive rocks

A

Igneous rock that forms when magma cools below the earths surface

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Batholiths

A

Large bodies of intrusive rocks, van stretch over 1000 kilometres.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Granite

A

Common intrusive rock that has crystals that are different colours that are visible.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Minerals

A

Substances that makes up rocks. It is obtained by mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Lithosphere

A

The outer part of the earth consisting of the crust and upper mantle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Magma

A

A boiling mixture containing molten rock and gases. It is found just below the earths surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Sediments

A

Mineral or organic matter deposited by water, air, or ice.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Native elements

A

Elements found uncombined in the earths crust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Crystal

A

A clear, transparent mineral or glass resembling ice

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Lustre

A

A mineral that describes the way that it reflects light. It is described as glassy or brilliant.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Streak

A

The powdery mark left in a mineral by scraping it on a hard surface like a white ceramic tile

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Hardness

A

A measure of how difficult it is to scratch the surface of a solid material.

29
Q

Igneous rocks

A

Rocks that form from hot magma “lava” being cooled down

30
Q

Extrusive rocks

A

Rocks that solidify above ground from lava

31
Q

Pumice

A

A igneous rock that is used for cleaning and is one of the only rocks that can float

32
Q

Scoria

A

A dark igneous rock that solidifys from lava that cools quickly

33
Q

Abrasive

A

A property of a material or substance that easily scratches another

34
Q

Sedimentary rocks

A

Types of rock that are made when sad, mud and pebbles get laid down in layers. They can also be from in water.

35
Q

Metamorphic rocks

A

Contains bands and layers formed by great pressure and another rock under great heat.

36
Q

Erosion

A

The wearing away and removal of soil and rock by naturally elements like wind

37
Q

Flood plains

A

Flat, open land beside a river where sediments are deposited during floods

38
Q

Glaciers

A

Large pieces of ice that move and push rocks and boulders.

39
Q

Moraines

A

Deposit left by movement of glaciers.

40
Q

Sandstone

A

A sedimentary rock with medium sized grains that are cemented together by lime, silica and other salts.

41
Q

Mudstone

A

A fine grained sedimentary rock without layering

42
Q

Shale

A

A fine grained sedimentary rock formed in layers

43
Q

Siltstone

A

A sedimentary rock with a particle size between sandstone and mudstone

44
Q

Conglomerate

A

Sedimentary rock containing large particles of various sizes cemented together

45
Q

Limestone

A

A sedimentary rock that is mainly formed from sea elements

46
Q

Coal

A

A sedimentary rock formed from dead organisms

47
Q

Rock salt

A

A sedimentary deposit formed when a salt lake or sea bed dried

48
Q

Metamorphism

A

The process that changes rocks by pressure or heat

49
Q

Slate

A

A fine grained metamorphic rock form d as a result as metamorphism

50
Q

Gneiss

A

A metamorphic rock formed with great pressure

51
Q

Mineral ores

A

Rocks mined to obtain a metal or other chemical within them

52
Q

Mining

A

Extraction of natural resources from the earth

53
Q

Environmental impact statement (EIS)

A

Study of the possible effects of a planned project on the environment

54
Q

Rehabilitation

A

Restored to its previous condition

55
Q

Overburden

A

Waste rock removed from below the topsoil. The rock is replaced when the area is restored

56
Q

Open-cut mining

A

Mining that scours our soil and rocks on the surface on the land

57
Q

Underground mining

A

Mining that’s uses shafts no tunnels to remove rock from deep below the surface

58
Q

Stone age

A

The time beginning about two million years ago during which early humans made implements of stone

59
Q

Alloy

A

A mixture with a metal and a non-metal

60
Q

Flint

A

A sedimentary rock that leaves a very sharp edge when broken

61
Q

Percussion flaking

A

A process in which tool stones such as flint or obsidian were struck with harder stones, such as quartzite, to shear large flakes that could be used to make small tools.

62
Q

Fossil

A

Remains or trace of any animal of an animal or plant of a former geological age

63
Q

Palaeontologists

A

A scientist who studies fossils

64
Q

Folding

A

Caused when rocks are under pressure from both sides

65
Q

Relative age

A

The age of a rock compared with the age of another rock

66
Q

Trace fossils

A

Fossils that provide evidence that an organism was present the rock was formed

67
Q

Extinct

A

Animals and plants that are know longer living and redeveloping

68
Q

Carnivores

A

Animals that eat other animals

69
Q

Scavengers

A

Animals that eat dead plants or dead animals

Science year 8 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions