User:Atcovi/Science/Earth's Minerals

First, we should learn the three types of rocks to really comprehend this assignment, Please be aware of our Science Fair:

Igneous Rocks
Rocks that form when melted rock material cools and hardens.

Sedimentary Rocks
A rock made of small bits of matter.

Metamorphic Rocks
A rock formed under heat and pressure from another rock.

Mineral's properties
Minerals are pieces of Earth's crust

Streak
The color of the mineral's powder after the mineral has been rubbed on a hard surface

Hardiness
How well a rock can resist scratching

Cleavage
This property is the tendency of a mineral to break along flat surfaces.

Cleavage is described by the number of directions, or planes, along which the mineral breaks.

What are minerals made of?
Elements