Rocks Flashcards

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1
Q

Igneous

A

Is a type of rock made from Lava or Magma

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2
Q

Magma

A

Magma is when hot liquid doesn’t come out of the volcano

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3
Q

Lava

A

Magma that has reached the surface of the earth

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4
Q

Extrusive

A

Rocks that fly out of a volcano or form on the ground

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5
Q

Intrusive

A

Rock that form inside the the chambers

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6
Q

mineral

A

A solid that is form om the earth

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7
Q

lithosphere

A

The outer part of the earth

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8
Q

Asthenosphere

A

The upper layer of the earth mantel

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9
Q

Crystal

A

a small piece of a substance and is formed when the substance turns into a solid

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10
Q

sedimentary rocks

A

rocks formed from by water

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11
Q

erosion

A

the wearing away of the soil and rock

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12
Q

floodplains

A

flat open land beside a river where sediments form after a flood or over flow of the river

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13
Q

glaciers

A

Large object of ice moving down slops

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14
Q

moraines

A

the rock that are left there by the glacier

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15
Q

sandstone

A

a rock with medium-sized grains

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16
Q

Mudstone

A

a grained, sedimentary rock without layers of rock/ sand

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17
Q

shale

A

a grained sedimentary rock formed in layers of clay

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18
Q

Siltstone

A

a sedimentary rock with a average size of Sandstone and Mudstone grains

19
Q

conglomerate

A

sedimentary rock containing large grain of different sizes cemented together

20
Q

limestone

A

a sedimentary rock formed from the remains of sea rocks

21
Q

coal

A

a sedimentary rock formed from dead plants and animals

22
Q

rock salt

A

a sedimentary rock that is formed when salt lake dries up

23
Q

Metamorphic rocks

A

Rock that was once one form of rock but has changed to another by heat and pressure

24
Q

Metamorphism

A

alteration of the composition or structure of a rock by heat and pressure

25
Q

mineral ores

A

rocks mined to obtain a metal or other chemical

26
Q

mining

A

extracting natural resources from the Earth

27
Q

environmental impact statement

A

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

28
Q

rehabilitated

A

restored to its previous condition

29
Q

overburden

A

waste rock removed from below the topsoil.

30
Q

open-cut mining

A

mining that scours out soil and rocks on the surface of the land

31
Q

underground mining

A

mining that uses shafts and tunnels to remove rock from deep below the surface

32
Q

Stone Age

A

the first known period of human culture by the use of stone tools

33
Q

alloy

A

a metal made by combining two or more metallic elements

34
Q

flint

A

a hard grey rock consisting of nearly pure silica

35
Q

percussion flaking

A

the shaping of a stone implement by striking or chipping off flakes with another stone or a piece of wood bone

36
Q

fossil

A

any remains of an animal or plant

37
Q

folding

A

the buckling of rocks

38
Q

palaeontologists

A

a scientist who studies fossils

39
Q

relative age

A

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

40
Q

carnivores

A

animal that eats other animals

41
Q

scavengers

A

animals that eat dead plant and animal material

42
Q

mould

A

a rock that shows the shape of the hard parts

43
Q

trace fossils

A

fossils that provide evidence such as footprints

44
Q

extinct

A

something that does not exist