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How do atoms form rocks?
Transcript of How do atoms form rocks?
First, what is an atom?
Atoms are pictured like this with a nucleus and shells with electrons.
But is this accurate?
Try showing that on a piece of paper!
THERE ARE 92 NATURALLY OCCURRING ELEMENTS.
which combine to form compounds
Minerals are compounds that crystallize under natural conditions from water, magma, or the alteration of other minerals.
Crystalline means their molectular structure
looks like this
See the difference?
In a crystalline structure
there is a pattern.
Let's take another look.
A solid with no ordered atomic arrangement is amorphous. Glass is amorphous.
A natural glass can be a rock, but not a mineral.
(rapidly cooled lava)
Most rocks are composed of minerals.
like this granite
A rock can be composed of many minerals.
or just one
like this quartzite
like the granite just shown, or
this metamorphic gneiss
or rock salt
WE DO EAT ROCKS!!!
How are atoms formed?
Yes, YOU ARE composed of star dust!!
And that is how atoms form minerals, and minerals form rocks.
like this volcanic glass
This is all quartz with a bit of rusty staining
another ordered pattern
randomly arranged atoms