Dont Know

Question 1

Gangue

Answer 1

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

Question 2

Reduction

Answer 2

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

Question 3

Smelting

Answer 3

Melting mineral ore in order to separate metal contained.

Question 4

Purification

Answer 4

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

Question 5

Peat

Answer 5

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

Question 6

Sediment

Answer 6

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

Question 7

Sedimentary rocks

Answer 7

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

Question 8

Overburden

Answer 8

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

Question 9

Natural gas

Answer 9

A fossil fuel consisting of mainly methane

Question 10

Porous

Answer 10

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

Question 11

Turbines

Answer 11

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

Question 12

Wind energy

Answer 12

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

Question 13

Biomass

Answer 13

Materials produced by living organisms

Question 14

Ocean wave energy

Answer 14

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

Question 15

Tidal energy

Answer 15

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.

Question 16

Geothermal energy

Answer 16

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

Question 17

Hydro-electricity

Answer 17

Power produced by the energy of falling water

Question 18

Full moon

Answer 18

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

Question 19

Phases

Answer 19

Shapes observed in a repeated pattern of changes

Question 20

Waxing

Answer 20

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

Question 21

Waning

Answer 21

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

Question 22

Revolution

Answer 22

Movement around an earth.

Question 23

Rotation

Answer 23

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

Question 24

Orbit

Answer 24

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.