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Year 8 Science > Rocks > Flashcards

Rocks Flashcards

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1
Q

hot fluid within the earth crust, in which lava forms from cooling.

A

magma

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2
Q

geometrically regular form with symmetrically arranged plane faces.

A

crystals

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3
Q

elements found uncombined in the earths crust

A

native elements

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4
Q

a measure of how hard difficult it is to scratch the surface of a solid

A

hardness

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5
Q

appearance of an mineral caused by the way it reflects light. it can appear glossy,waxy.dull,peraly ect

A

lustre

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6
Q

material broken down by weathering and erosion that is moved by wind or water .

A

sediments

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7
Q

the outmost layer of the earth, includes the crust and uppermost part of the mantle.

A

lithoshere

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8
Q

colour of a mineral as fine powder, found by rubbing

A

streak

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9
Q

all rocks consists these

A

mineral

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10
Q

the process of eroding or being eroded by wind, water, or other natural agents.

A

Erosion

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11
Q

rocks composed of broken pieces of older rocks.

A

clastic

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12
Q

when rocks have been evaporated by water and dissoved minerals are left behind.

A

Chemical

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13
Q

when rocks that are made from dead thing. Dead (once alive).

A

organic

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14
Q

the remains or impression of a plant or animal embedded in rock and preserved .

A

fossils

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15
Q

rocks that form from the cooling of lava or magma as it is thrown through the air from a volcanic eruption

A

igneous rocks

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16
Q

in which hot magma from inside the Earth crust flows out onto the surface as lava to form rock

A

extrusive rocks

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17
Q

a rock that is light and has many holes due to being solidified in the air. it also that light it can float on water

A

pumice

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18
Q

a dark, igneous rock formed from gassy lava that cools quickly

A

scoria

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19
Q

a dark-colored, fine-grained, igneous rock it tends to be sharp and have holes.

A

basalt

20
Q

when the rock solidified in the crust.

A

intrusive rocks

21
Q

a black, glassy rock that breaks into pieces with smooth shell-like surfaces

A

obsidian

22
Q

igneous rock consisting mainly of quartz, mica, and feldspar and often used as a building stone.

A

Granite

23
Q

the process that changes rocks by extreme pressure or heat (or both)

A

metamorphism

24
Q

rock formed from another rock that has been under great heat or pressure (or both)

A

metamorphic rocks

25
Q

a metamorphic rock formed as a result of great pressure on limestone

A

marble

26
Q

a coarse-grained metamorphic rock formed mainly as a result of great pressure on granite

A

gneiss

27
Q

rocks mined to obtain a metal or other chemical within them

A

mineral ores

28
Q

extraction of natural resources from the Earth

A

mining

29
Q

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

A

environmental impact statement (EIS)

30
Q

restored to its previous condition

A

rehabilitated

31
Q

any remains, impression, or trace of an animal or plant of a former geological age; evidence of life in the past

A

Fossils

32
Q

fossil any remains, impression, or trace of an animal or plant of a former geological age; evidence of life in the past

A

folding

33
Q

a scientist who studies fossils

A

palaeontologists

34
Q

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

A

relative age

35
Q

animal that eats other animals

A

carnivores

36
Q

animals that eat dead plant and animal material

A

scavengers

37
Q

cavity in a rock that shows the shape of the hard parts of an organism; types of fungi found growing on the surface of foods

A

mould

38
Q

something that is no longer alive but was ones alive

A

extinct

39
Q

fossils that provide evidence, such as footprints, that an organism was present when the rock was formed

A

trace fossils

40
Q

describes an animal whose body temperature is determined by its environment

A

ectothermic

41
Q

extraction of natural resources from the Earth

A

mining

42
Q

restored to its previous condition

A

rehabilitated

43
Q

waste rock removed from below the topsoil. This rock is replaced when the area is restored.

A

overburden

44
Q

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

A

open-cut mining

45
Q

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

A

underground

Year 8 Science (2 decks)

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