Rocks
and Minerals Study Guide
Read
Chapter 2, Lesson 1
What is
the difference between a rock and a mineral?
- Mineral – formed in nature, never been alive, only made up of one substance
- Rock- made up of one or more minerals
*All
rocks are minerals, but all minerals are not rocks.
How do
scientists identify minerals? (page 61)
·
scratch
test (test of hardness)
- streak test
- luster (how shiny or dull)
- color
Hardness Test:
·
Mohs
is the name used for the scale to test minerals for hardness.
·
The
scale goes from 1-10 with 1 being the sofest (talc) and 10 being the hardest
(diamond).
·
A
mineral can scratch any other mineral with a lower number. For example, a mineral with a hardness of 3
can scratch any mineral with a hardness of 1 or 2. A diamond with a hardness of 10 can scratch
any mineral that has a hardness of 9 or lower.
A diamond is the hardest mineral.
·
If
a mineral can be scratched by your fingernail, it is a soft mineral and will
have a low number (1 or 2) on the Mohs scale.
·
Hardness
and color are the main properties used for identifying minerals.
Difference in ways that
minerals and rocks are identified:
|
Main Idea: Many properties can help identify minerals
and rocks.
|
|
|
Minerals can be
identified by:
A._____hardness_(MOHs
Scale)___
B._____streak ________________
C._____color__________________
|
Rocks can be identified
by:
D.______texture________________
E.______minerals they
are made from
F.______how easily it
crumbles_____
|
No comments:
Post a Comment