What is a mineral?

What are minerals used for?

What do we use to identify a mineral?

How is hardness of a rock or mineral tested?

What is a streak test?

What is a mineral lustre and what are the types of it?

What does density mean in relation to minerals?

If you put acid on a... it fizzes

Explain the process in which free flowing lava cools.

Lava which is very slowly running (viscous) cools to form....

When does Rhyolite crystalize?

What do volcanoes that produce Rhyolite look like?