Rocks in General Flashcards
1
Q
Rocks
A
Rocks are formed in the Earth’s lithosphere by substances known as minerals.
2
Q
Lithosphere
A
The lithosphere is the solid, outer part of Earth.
3
Q
What is Classified as a Rock
A
A rock is any naturally occurring solid substance with a definite shape
4
Q
Minerals in Rock
A
Most minerals in rocks are compounds with one or more metal elements together with oxygen and silicon
5
Q
Crystal Form
A
A set of crystals related to each other by symmetry
6
Q
Hardness
A
This is determined by trying to scratch one mineral on another
7
Q
Streak
A
The powdery mask left behind by a mineral when it is scraped across a hard surface
8
Q
Lustre
A
The appearance of the surface of a rock in terms of light-reflecting properties
9
Q
Cleavage
A
The tendency of a mineral to break long weak planes
