Dont Know Flashcards

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1
Q

Gangue

A

Leftover waste rock and mineral material. It is produced during the processes that extract mineral ores.

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2
Q

Reduction

A

Brining a mineral ore into a metallic state, by separating the non-metallic constituents.

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3
Q

Smelting

A

Melting mineral ore in order to separate metal contained.

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4
Q

Purification

A

The removal of impurities from metals to produce a pure metal.

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5
Q

Peat

A

Partially decomposed plant matter, buried and compressed over millions of years by layers of other plants in marshy or damp regions.

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6
Q

Sediment

A

A substance deposited on land or in rivers, lakes and rivers

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7
Q

Sedimentary rocks

A

Rocks formed from sediments depoisted by water, wind or ice. The sediments are cemented together in layers, under pressure

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8
Q

Overburden

A

Rock, soil and vegetation, which are removed before mining can commence

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9
Q

Natural gas

A

A fossil fuel consisting of mainly methane

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10
Q

Porous

A

Having many pores on other small spaces that can hold a gas or liquid or allow it to pass through

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11
Q

Turbines

A

Wheels that, when turned, drive electrical generators stream or water are often used to turn turbines

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12
Q

Wind energy

A

A renewable energy derived from the wind (caused by uneven heating of the earth and its ocean by the sun)

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13
Q

Biomass

A

Materials produced by living organisms

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14
Q

Ocean wave energy

A

A renewable energy created by converting energy of ocean waves to electrical energy

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15
Q

Tidal energy

A

A renewable energy that can be harvested from the tides in the ocean through the use of large underwater turbines placed in areas of high tidal movement.

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16
Q

Geothermal energy

A

Heat energy transferred from rocks below the earth’s surface.

17
Q

Hydro-electricity

A

Power produced by the energy of falling water

18
Q

Full moon

A

The view of the moon seen from earth when the whole of its near side is in sunlight. The shape seen is circular.

19
Q

Phases

A

Shapes observed in a repeated pattern of changes

20
Q

Waxing

A

The change in the moon’s appearance between a new moon and the following full moon.

21
Q

Waning

A

The change in the moon’s appearance between a full moon and the following new moon.

22
Q

Revolution

A

Movement around an earth.

23
Q

Rotation

A

The turning of the earth about its own axis (between north and south Poles). It takes 24 hours to complete one rotation.

24
Q

Orbit

A

The curved path of a celestial or spacecraft about a star or planet, for example, the path of the earth around the sun or the moon around the earth.