Question

9. The substance in rock that is of no use to us is called __________________________.
A. Gangue

B. Ore

C. Mineral

D. Metal

10. Petroleum and natural gas occur in ____________________ types of rocks.
A. Igneous

B. Sedimentary

C. Metamorphic

D. All of these

11. Marble in its purest form is ___________________ in colour.
A. White

B. Pink

C. Black

D. Green

12. The softest known mineral is _____________________.
A. Rock salt

B. China clay

C. Talc

D. None of these

Answer 1

Answer:

9. d Metal

10. b Sedimentary rock

11. a Marble in its purest form is white

12. c Talc is the softest known mineral

Answer 2

Mineral is correct answer