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A rock is a naturally formed, consolidated material composed of grains of one or more minerals.
What is a rock?
What is the difference between a rock & a mineral?
Minerals are solid, naturally occurring, inorganic, have a fixed composition and are made of one or more elements.
Rocks are made of one or more minerals.
Made of elements
Solid
Can be made of
lava/ magma
Have crystals
Can be formed
from solutions
Must be inorganic
Made only of compounds
Elements must be chemically
bonded
Naturally occurring
Can be made from
organic materials
Mixtures made of minerals
Our houses stand on them Our roads are made of them They are a link to the formation of the Earth
We use the minerals in them for everything!
There would be a lot of unemployed geologists without them
Why are rocks important?
Metamorphism…The transformation of a rock into a texturally or mineralogically distinct rock, without the rock completely melting
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