1.Which mineral is used in making cans and is found mainly in Australia?

hematite

bauxite

tektite

magnetite

2.Smelting is the major method used to refine and enrich which of the following?

oil

coal

iron ore

uranium ore

3.Which of the following is an example of sustainable use of natural resources?

harvesting huge populations of fish from a fishing shoal

clear-cutting a forest

planting multiple crops together on a field and harvesting them at different times

continuously strip mining coal deposits in an area