What is Lustre?

What is Streak?

What is Fracture?

What is Cleavage?

What is Hardness?

How are Metamorphic Rocks Formed?

How are Sedimentary Rocks Formed?

How are igneous rocks formed?

What's the difference between extrusive and intrusive igneous rocks?

3 examples of Sedimentary rocks.

3 Examples of Igneous rocks.

3 examples of Metamorphic rocks.