4th Grade Ch 8 Lesson 3 What Are Igneous And Metamorphic Rocks

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.