Minerals

Which of the following is NOT true about minerals?

• Each mineral has a fixed chemical composition

• Minerals are renewable resources

• Minerals are natural substances

• Minerals are very useful for us

The rock from which aluminium can be obtained is the ........ of aluminium.

• alloy

• sediment

• source

• ore

Crude oil is extracted from the earth's interior by a process called.......................

• drilling

• quarrying

• digging

• transmitting

Haematite is an ore of iron with the highest iron content

• True

• False

Which of the following is NOT true about aluminium.

• Aluminium is a metallic mineral

• Aluminium is a poor conductor of electricity

• Aluminium is a tough and light metal

• All of the above

Identify the mineral which is used in producing nuclear power.

• Gold

• Uranium

• Manganese

• Bauxite

Choose a mineral which is non-metallic.

• mica

• manganese

• copper

• silver

Choose those metals which are usually used in making electric wires

• iron

• copper

• gold

• aluminium

Tick alloys from the given list.

• silver

• german silver

• brass

• copper

• bronze

What is the name given to those mines which are very close to the earth's surface?

• shafts

• quarries

• oil wells

• drills