rocks and minerals Flashcards
1
Q
mineral
A
a substance that is formed naturally in the earth, is organic, has a definite chemical composition and has a crystal structure.
2
Q
streak
A
the color of a mineral’s powder when it is rubbed against a porcelain plate.
3
Q
luster
A
the way the surface of mineral reflects light.
4
Q
inorganic
A
not derived from living water.
5
Q
crystal
A
a solid formation that follow’s a pattern
6
Q
hardness
A
is the ability to scratch or be scratched by another mineral.
7
Q
cleavage
A
the tendency of crystals and minerals to break along defiant planes resulting in smooth surfaces.
8
Q
fracture
A
the appearance of a freshly broken surface on a mineral that has a rough or irregular surface.
9
Q
mohs hardness scale
A
a hardness scale used to classify materials.
