4th grade ch 8 lesson 3 what are igneous and metamorphic rocks
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Ch. 8 Lesson 3Ch. 8 Lesson 3What are What are
igneous and igneous and metamorphic metamorphic
rocks?rocks?
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igneous
forms when molten rock cools
& hardens
cools slowly large crystals
cools quickly small crystals
examples:
BasaltPumice
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igneous rock at Sunset Crater, Arizona
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metamorphic
rocks that have
changed dueto heat & pressure
examples:gneissslate
Form fromsedimentary,
igneous & other metamorphic
rocks
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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 now is 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 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.