rocks and minerals notes - ms. carvalho's fourth...
TRANSCRIPT
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ROCKS AND MINERALS
Class Notes
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MINERALS:
A mineral is natural and non-living. It’s what makes up rocks.
They are the building blocks of rocks!
There are over 3000 kinds!
Minerals have different “properties” (a way to describe something)
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PROPERTIES OF MINERALS:
Color-what color is it?
Hardness- “scratch test”, Moh’s Scale
Luster-shiny? metallic? dull? Glassy?
Streak-powder color it leaves behind when scratched
Cleavage (not in your book!)-how a rock splits
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LET’S WATCH A VIDEO!
Brainpop Mineral Identification
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LET’S DESCRIBE SOME MINERALS
How would you describe this mineral’s....
color?
luster?
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How about this mineral? Or this one?
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THE 3 TYPES OF ROCKS
There are three categories of rocks
igneous
metamorphic
sedimentary
The differences between them have to do with how they are formed.
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IGNEOUS
Igneous rock forms from magma that has cooled and hardened.
Magma comes from either BELOW the earth’s crust or from ABOVE the earth’s crust (then its called lava!)
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HOW DID THESE IGNEOUS ROCKS COOL? FAST OR SLOW?
How fast it cools affects the texture:
➡If it cools quickly- small grains, small crystals, smooth texture
➡If it cools slowly-large grains, large crystals, rough texture
➡Identify the Igneous texture
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SEDIMENTARY
sediment -small pieces of rocks, minerals, soil, shells, bones, etc
Wind and water form layers of sediment.
Sedimentary rocks form when these layers of sediment are pressed together until they harden into rock.
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Sedimentary Rock Facts:
Usually the only rock that will contain fossils
You can usually see sand, pebbles, or other stones in the rock
Often soft and crumbles easily
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METAMORPHIC ROCK
starts as another type of rock and CHANGE because of EXTREME heat and pressure
Metamorphic rocks can change into another metamorphic rock
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THE ROCK CYCLE
It is how Earth changes one type of rock into another type of rock.
Rocks change due to heat, weathering/erosion, and cooling, and pressure
Earth is like one big rock recycling machine!
It takes MILLIONS of years for a rock to go through the rock cycle.
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LET’S SEE WHAT THIS LOOKS LIKE:
The Rock Cycle (interactive)
Study Jams Rock Cycle
Rock Cycle Interactive
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VIDEO TIME!
Let’s watch a video to understand all of this a bit better.....
Types of rock with FOOD