1.
What is lignite?
A
A high-quality iron ore
B
A volcanic rock
C
A low-grade brown coal
D
A type of copper ore
2 practice sets · Page 1 of 1
What is lignite?
A high-quality iron ore
A volcanic rock
A low-grade brown coal
A type of copper ore
In which type of rock is coal found?
Igneous
Metamorphic
Volcanic
Sedimentary