A radioactive material used in nuclear defence system and nuclear generation of electricity

1. limestone
2. coal
3. uranium
4. mica

Mexico is the largest producer of which mineral?

1. Silver
2. Gold
3. mica
4. copper

A form of underground mining using shafts

1. Drilling
2. Surface mining
3. Sub-surface mining

Practice of mining a seam of mineral by first removing a long strip of overlying soil and rock

1. open pit mining
2. strip mining
3. sub-surface mining