Transcript Rocks Rock! - LearningExchange

Rocks Rock!
The Rock Cycle
3 Types of Rocks
Sedimentary
Igneous
Metamorphic
Sedimentary Rock
 This
type of rock forms when small pieces of
clay, silt, or sand (and plants and animals) settle
into layers on the bottoms of lakes and oceans.
 Over
time, the layers harden into the
sedimentary rock we see today.
 Most
fossils are found in sedimentary rock.
Examples of Sedimentary Rock
 Sandstone
 Limestone
 Shale
Igneous Rock
 Melted
rock (magma) can push up through
cracks in the earth’s crust.
 When
the melted rock cools and hardens, it is
called igneous rock.
 There
are two classifications of igneous rock:
extrusive and intrusive.
Examples of Igneous Rock
 Basalt
 Granite
 Obsidian
Metamorphic Rock
 The
word ‘metamorphic’ comes from a word
that means “to change”.
 These
are rocks that were changed from one
kind to another kind by heat and pressure.
 Heat
+ Pressure + Time = Metamorphic Rock
Examples of Metamorphic Rocks
 Marble
– (from limestone)
 Gneiss
– (from granite)
 Quartzite
– (from sandstone)
Famous Examples
Igneous:
Basalt
Sedimentary:
Metamorphic:
Marble
Michael Schroeter
Limestone
Devil’s Tower
Wyoming
Francisco Martins
The Taj Mahal
Agra, India
Sam and Ian
All photos licensed under the
‘Creative Commons’.
The Great Sphinx
Egypt
Sources
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Discovery Education. "Sedimentary Rock."
Discovery Education: http://streaming.discoveryeducation.com/
Discovery Education. "Metamorphic Rock."
Discovery Education: http://streaming.discoveryeducation.com/
Discovery Education. "Igneous Rock."
Discovery Education: http://streaming.discoveryeducation.com/
http://www.discoveryeducation.com
Cole, Joanna. (1987). The Magic School Bus Inside the Earth. Scholastic,
New York, New York.
http://www.geology.about.com.
http://www.flickr.com.