Third Grade Rocks!
A study of three different
kinds of rocks
Created by:
Denise T. Cox,
Corley Elementary School,
Lawrenceville, GA
What are sedimentary rocks?
Sedimentary Rocks
How They are Made
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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
2 Types of Sedimentary Rocks
Shale
Go to Igneous Rocks
Limestone
Shale is a Sedimentary Rock
Shale
Shale rocks are sedimentary rocks which were
formed from clay that is compacted together
by pressure.
Shale is used to make bricks.
Some baseball diamonds use
shale rocks.
Shale is used for pathways,
driveways, and landscaping, too.
Driveways
Pathways and landscaping
Limestone is a Sedimentary Rock
Limestone
Limestone is a sedimentary rock which was
formed from the mineral calcite which came
from seas and lakes that dried up and from sea
animal shells.
Limestone is used in concrete.
Limestone is used for buildings.
Limestone is used in toothpaste,
antacids and face powder, too.
toothpaste
face powder
antacids
Igneous Rock forming
What are igneous rocks?
Igneous Rocks
What are They?
• Fire Rocks
• Formed underground by trapped, cooled
magma
• Formed above ground when volcanoes
erupt and magma cools
2 Types of Igneous Rocks
• Granite
• Pumice
Go to Metamorphic Rocks
Granite is an Igneous Rock
Granite
Granite rocks are igneous rocks which were
formed by slowly cooling pockets of magma
that were trapped beneath the earth's surface.
Granite is used for buildings. Georgia’s
capitol is made of Georgia granite.
Stone Mountain is made of granite.
Monuments and household items are
made of granite.
Granite countertops
Washington Monument
Pumice is an Igneous Rock
Pumice
Pumice rocks are igneous rocks which were
formed when lava cooled quickly above
ground. This rock is so light, that many
pumice rocks will actually float in water.
Landscape rocks
Landscape boulders
Because this rock is so light, it
is often used as a decorative
landscape stone.
Ground to a powder, it is used as
an abrasive in polish compounds
and in Lava© soap.
Furniture cleaner
Lava bath soap
Pumice stones are also used to
smooth rough skin on your feet.
Smoothes skin
What are metamorphic rocks?
Metamorphic Rocks
What are They?
• Rocks that have changed
• They were once igneous or sedimentary
• Pressure and heat changed the rocks
2 Types of Metamorphic Rocks
Marble
Slate
Go to the end of the show
Marble is a metamorphic rock
Marble
Marble is a metamorphic rock that is formed
when limestone is changed.
Marble comes in many colors.
Marble is used to make buildings.
Statues and household items are
also made from marble.
Bathroom sink
fountain
Slate is a metamorphic rock
Slate
Slate is a metamorphic rock that is formed
when shale had low heat and a little pressure
on it.
Slate can be any color but is mostly found in gray
or black. When it is broken, it splits into layers.
Slate is used to make roofs.
Slate is used for stepping stones
and floors.
Slate was also used for chalkboards
and pool tables.
chalkboard
Pool table
Click on the rocks for a fun activity.
You will test some rocks to see if they
float and find some other
information about them.
http://www.sciencekids.co.nz/gamesactivities/rockssoils.html
Congratulations!
You Rock!
You completed this rockin’
research project!
Thank you to Rock Hounds for the rock formation animations!
http://sln.fi.edu/fellows/payton/rocks/create/index.html