By: Katie Kartchner

The rock cycle is an Idolized cycle of processes undergone by rocks in the Earth’s crust.

There are three types of rock…

◦ Igneous

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Sedimentary

Metamorphic

1.

First, our journey begins in the mantle. Here we see some red hot magma that is being pushed up towards the crust. Some of this magma creeps into the cracks of the volcano; while, the rest is forced out of the top of the volcano. Once the magma is out of the volcano, it is called lava. The lava cools and forms igneous rocks.

2. Then some of the igneous rocks roll down the mountains formed by the volcanoes and eventually end up in the ocean. As they roll, bits and pieces of the igneous rocks are broken and form sediments. Layer after layer of sediments are pressed and cemented together forming sedimentary rocks.

 Some of the sedimentary rocks on the very bottom get hot because of the pressure and change to metamorphic rock. When the metamorphic rock is buried deeper, it gets hotter and melts. Once again, it becomes magma and may eventually be pushed up and out of a volcano.

 ◦ ◦ You will use these links to guide you while finding all the answers to these questions on the next slide.

http://www.brainpop.com/science/theearthsystem/ rockcycle/preview.weml

http://www.rocksforkids.com/RFK/howrocks.html# Cycle

1) 2) 3) What are the three main kinds of rocks? Name some example of these three kind of rocks.

What are rocks made of? Why are rocks so different?

Igneous is a rock formed by the solidification of molten magma.

  Igneous rock can change into sedimentary rock or into metamorphic rock. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly.

Example: ◦ Granite ◦ ◦ Gabbro Basalt

You are an igneous rock, you will type a story about the rock cycle while being an igneous rock. Click on the picture to go to a site that explains the rock cycle.

  Sedimentary is a rock formed from consolidated clay sediments.

Seventy percent of all the rocks on earth are sedimentary rocks. The earth’s surface is constantly eroded. This means that rocks are broken up into smaller pieces by weathering agents such as wind, water, and ice. ◦ ◦ ◦ Examples: Sandstone Limestone Shale

 Answer the questions on the next slide.

1) 2) 3) What is a sedimentary rock?

How do they differ from other rocks?

How can different sedimentary rocks differ in appearance

A metamorphic rock is altered by pressure and heat.

   Metamorphic rock can change into igneous or sedimentary rock. Animation Examples: ◦ Gneiss ◦ ◦ Marble Slate

Describe the procedure you would suggest for identifying common sedimentary rocks.

  http://www.kn.att.com/wired/fil/pages/webr ocksal.html

http://www.rocksforkids.com/RFK/howrocks.

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