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Ch. 8 Lesson 3Ch. 8 Lesson 3What are What are
igneous and igneous and metamorphic metamorphic
rocks?rocks?
igneous
forms when molten rock cools
& hardens
cools slowly large crystals
cools quickly small crystals
examples:
BasaltPumice
igneous rock at Sunset Crater, Arizona
metamorphic
rocks that have
changed dueto heat & pressure
examples:gneissslate
Form fromsedimentary,
igneous & other metamorphic
rocks
metamorphic rock at the bottom of the Grand Canyon
metamorphic rocks
The more you try to be gneiss, the more you get taken for granite.
rock cycle
• how rocks change from 1 kind into another
Interactive Rock Cycle Game
Interactive Rock Cycle animation
• 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")
Rock layers are put down in the order in which they were formed.
Rock layers are put down in the order in which they were formed.