Chapter 9 Flashcards

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1
Q

Lithosphere

A

the outermost layer of the Earth, includes the crust and uppermost part of the mantle

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2
Q

Magma

A

a very hot mixture of molten rock and gases, just below the Earth’s surface, that has come from the mantle

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3
Q

Lava

A

hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.

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4
Q

Native Element

A

elements found uncombined in the Earth’s crust

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5
Q

Crystal

A

geometrically-shaped substance made up of atoms and molecules arranged in one of seven different shapes. The elements that make up a crystal and the conditions present during the crystal’s growth determine the arrangement of atoms and molecules and the shape of the crystals.

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6
Q

Mohs Scale

A

a scale of hardness used in classifying minerals. It runs from 1 to 10 using a series of reference minerals, and position on the scale depends on ability to scratch minerals rated lower.

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7
Q

Igneous Rock

A

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

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8
Q

Extrusive Igneous Rock

A

igneous rock that forms when lava cools above the Earth’s surface

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9
Q

Intrusive Igneous Rock

A

igneous rock that forms when magma cools below the Earth’s surface

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10
Q

Batholith

A

intrusive rock mass that measures more than 100 kilometres across

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11
Q

Erosion

A

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

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12
Q

Sediment

A

matter that settles to the bottom of a liquid;

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13
Q

Floodplain

A

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

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14
Q

Sedimentary Rock

A

Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth’s surface and within bodies of water.

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15
Q

Coal

A

a sedimentary rock formed from dead plants and animals that were buried before rotting completely

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16
Q

Limestone

A

a sedimentary rock formed from the remains of sea organisms. It consists mainly of calcium carbonate.

17
Q

Conglomerate Rock

A

sedimentary rock containing large particles of various sizes cemented together

18
Q

Metamorphic Rock

A

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

19
Q

Rock Cycle

A

an idealized cycle of processes undergone by rocks in the earth’s crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, and further melting and igneous intrusion.

20
Q

Mineral Ore

A

rocks mined to obtain a metal or other chemical within them

21
Q

Open-cut mining

A

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

22
Q

Underground Mining

A

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

23
Q

Palaeontologist

A

a scientist who studies fossils

24
Q

Fossil

A

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

25
Q

Trace Fossil

A

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