Transcript Rocks - SchoolRack

Rocks
Rocks Rock!!!!
• When you classify objects, you organize
them into groups based on common
characteristics.
• What are some different ways you could
classify these marbles?
• What characteristics do you think
scientists use to classify rocks?
What are Rocks?
What are Rocks?
• Rock is a natural
occurring solid mixture of
one or more minerals
and organic matter
So what is a Mineral?
So what is a Mineral?
• Naturally formed solid
matter that has a
crystalline structure.
How do you describe Minerals?
How do you describe Minerals?
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Color
Hardness
Density
Fracture
Composition
Texture
Composition
• Limestone is a rock composed of the
minerals Calcite and Argonite.
• Limestone= CaCO3
Grains
• Fine Grain
• Small
crystals
• Basalt
• Med Grain
• Granite
• Coarse Grain
• Crystals are
large and can
be seen with
the naked eye
• Conglomorate
Rock
Texture
Fig. 5.1
Rock type
Igneous
Sedimentary
Metamorphic
Characteristics
Three Types of Rocks
Three Types of Rocks
• Igneous
• Sedimentary
• Metamorphic
• Write at least two paragraphs
on how rocks can move
through the rock cycle using at
least 8 vocabulary terms.
Genetic Classification of Igneous Rocks
• Extrusive: … lava cools above ground.
Ash
Pumice
Scoria
Process of Intrusion
• Intrusive rocks..... lava cools underground