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 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

2 Types of Sedimentary Rocks

Shale Limestone

Go to Igneous Rocks

Shale is a Sedimentary RockShale

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 useshale rocks.

Shale is used for pathways, driveways, and landscaping, too.

Pathways and landscaping

Driveways

Limestone is a Sedimentary RockLimestone

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

antacids

face powder

Igneous Rock forming

What are igneous rocks?

Igneous RocksWhat 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 RockGranite

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.

Washington Monument

Granite countertops

Pumice is an Igneous RockPumice

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.

Because this rock is so light, it is often used as a decorative landscape stone.

Landscape bouldersLandscape rocks

Ground to a powder, it is used as an abrasive in polish compounds and in Lava© soap.

Lava bath soap

Furniture cleaner

Pumice stones are also used to smooth rough skin on your feet.

Smoothes skin

What are metamorphic rocks?

Metamorphic RocksWhat 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 rockMarble

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 rockSlate

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 on houses.

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.bbc.co.uk/schools/ks2bitesize/science/activities/rocks_soils_fs.shtml

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