Chapter 20 HW part 1
Minerals are made up of different elements and rocks are
A physical mixture of materials - minerals, fossils, fossil fragments, and/or organic matter
In an area of regional metamorphism if buried rock begins to melt it
Can become igneous rock
Before beach sand becomes rock it must be
Compacted, cemented, and lithified
A minerals physical properties are dependent on
Composition, structure, and bonding
As magma cools, the first minerals to crystallize are those with a
Low silica content
In the process of crystallization, the remaining magma becomes
More and more silica enriched
Minerals with the same chemical composition will
Not always have the same crystalline structure
Silicates are the most common rock forming minerals because
Oxygen and silicon are the two most abundant elements
The great variety of igneous rocks is due to
Partial melting and the step by step process of crystallization
Why is oxygen the most common element in Earth's crust, but not in Earth as a whole?
density segregation - dense elements sank to earths center, and lighter elements rose to the surface.