5th grade ch. 9 lesson 6 how are rocks classified
TRANSCRIPT
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Ch. 9Ch. 9Lesson 6Lesson 6
How are rocks How are rocks classified?classified?
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3 types of rocks
igneous metamorphicsedimentary
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igneous
forms when melted rock cools
& hardens
cools slowly large crystals
cools quickly small crystals
examples:
Basalt
Granite
Pumice
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igneous rock at Sunset Crater, Arizona
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sedimentary
form when layers of
materials & rock particles
settle on top of each other& harden
plant & animalfossils
examples:sandstone
conglomerate
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Rock layers are put down in the order in which they were formed.
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Rock layers are put down in the order in which they were formed.
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sedimentary rock at Bryce Canyon, Utah
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metamorphic
formed whenexisting rock squeezed &
heated @ high temp.
examples:gneissslate
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metamorphic rock at the bottom of the Grand Canyon
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metamorphic rocks
The more you try to be gneiss, the more you get taken for granite.
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rock cycle
• how rocks change from 1 kind into another
Interactive Rock Cycle Game
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Interactive Rock Cycle animation
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• SEDIMENTARY rock Has been formed in layers Often found near water sources With fossils from decayers
• Then there's IGNEOUS rock Here since Earth was born Molten lava, cooled and hardened That's how it is formed
• These two types of rocks Can also be transformed With pressure, heat and chemicals
METAMORPHIC will be formed. ( Don't forget to sing this as a "Round"; after all, it is the Rock "Cycle"! )
Rock Cycle Song
(Sing to the tune of
"Row, Row, Row Your
Boat")
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Rock Cycle ActivitySugar cube before
Type of rock
Sedimentary
Metamorphic or igneous
Observations
Hard cube
Sugar cube during
Shook it-became chipped
Changed shape-round
Bubbly & oily-yellow & brown
Became liquid
Sugar cube at end
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Procedure:
1. Fold up the sides of the aluminum foil square to make a small tray.
2. Pour the sugar sediment onto the tray.
3. Describe the appearance of the sugar in your data table.
4. Secure the candle on your table in a lump of clay.
5. Predict what you think will happen if you heat the sugar. Record your prediction.
6. Use tongs to hold the tray. Heat the sugar slowly by moving the tray gently back and forth over the flame. Make observations while the sugar is heating.
7. When you think there is no longer a chemical reaction occurring, blow out the candle.
8. Allow the tray to cool for a few seconds and set it down on your desk. Record your observations of the material left in the tray.