Download Minerals - Educator Pages

DAILY SCIENCE
Why do we have oceanic and continental crust?
 Using your data from yesterdays lab, construct a
diagram that depicts the differences in oceanic
and continental crust as it relates to sinking and
floating in the mantle
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MINERALS
Pg. 33
MINERAL

A naturally occurring, inorganic solid compound
with a specific chemical composition and a
definite crystalline structure.
BREAK IT DOWN (WHAT IS A MINERAL)
Naturally occurring- formed in nature, not in a
lab.
 Inorganic- not living/never alive
 Compound- can’t be physically separated
 Ex. Salt is a mineral while sugar is not.

BREAK IT DOWN (CONT)
Specific chemical structure- must be a solid
 Each mineral has a unique chemical make up
 Ex. Quartz- SiO2

BREAK IT DOWN (CONT)
Crystalline structure- regular geometric patterns
that are repeated again and again
 Crystal- solid arranged in repeating patterns
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CRYSTAL SYSTEMS

Cubic

Tetragonal

Hexagonal

Orthorhombic

Monoclinic

Triclinic
EXAMPLES

Cubic (Pyrite)

Tetragonal (Wulfenite)
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Hexagonal (Pyromorphite)

Orthorhombic (Topaz)

Monoclinic (Gypsum)

Triclinic (Feldspar)
MINERAL FORMATION

From magma- molten material found beneath
Earth’s surface rises and cools
Small crystals form from rapidly cooling magma
 Large crystals form from slowly cooling magma


From solutions- if a solution becomes over
saturated, mineral crystals begin to precipitate.

When liquid evaporates, solids form
MINERAL GROUPS

3000 minerals are found in Earth’s Crust
Silicates- minerals that contain oxygen, silicon, and
usually one other element (make up 96% of minerals)
 Carbonates- composed of one or more metallic
elements w/ a carbonate compound (CO3)
 Oxides- oxygen and a metal
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PG. 34
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Use the following terms to construct a concept map of the six
major crystal systems.
Gypsum
Topaz
Pyrite
Triclinic
Cubic
Hexagonal
Tetragonal
Crystal systems
Wulfenite
Pyromorphite
Feldspar
Orthorhombic
monoclinic