Rocks

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Rocks
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Types of Rocks
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Igneous RocksWhat are They?

• Fire Rocks
• Formed underground by trapped, cooled magma
• Formed above ground when volcanoes erupt and
  magma cools

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Types of Igneous Rocks
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Sedimentary RocksHow They are Made

• Wind and water break down the earth
• Bits of earth settle in lakes and rivers
• Layers are formed and build up
• Pressure and time turn the layers to rock

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Types of Sedimentary Rocks
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Metamorphic RocksWhat are They?

• Rocks that have changed
• They were once igneous or sedimentary
• Pressure and heat changed the rocks

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Types of Metamorphic Rocks
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The Life of a Rock
Layers of sediment join together.
Changes are made from pressure and heat.
Melted rock cools and hardens
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Rocks Have Been Used For Many Years and For
Many Things
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Rocks
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The Rock Cycle Song (Sing to the tune of Row,
Row, Row Your Boat SEDIMENTARY rock Has been
formed in layers Often found near water
sources With fossils from decayers Then theres
IGNEOUS rocks Here since Earth was born Molten
lava, cooled and hardened Thats how it is
formed These two types of rocks Can also be
transformed With pressure, heat, and
chemicals METAMORPHIC theyll become. (Dont
forget to try singing in rounds!)
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Examples of Metamorphic Rocks

• Granite to gneiss
• Similar colors in minerals
• Spots look changed somehow
• Sandstone to quartzite
• Sandstone looks like it has tiny crystals
• or pieces of sand cemented together
• Quartzite has tiny crystals
• Limestone to marble
• Limestone appears to be creamy white or pale
  gray
• and appear layered and flat
• Marble can be similar in color
• Shale to slate
• Metamorphic rocks undergo intense heat and
  pressure to change the original rock into a new
  rock, but the new rock is still comprised of the
  same minerals as the original rock.

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