By Morgan Brandt

THE ROCK CYCLE

What is a rock?

• Solid• Occurs through nature• Made up of minerals

Info from: http://www.rocksandminerals4u.com/what_is_a_rock.html

Characteristics of the Rock Cycle

• Three types of rocks– Igneous– Sedimentary–Metamorphic

Info from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Igneous Rock• Formed from molten rock becoming solid• Molten rock – Called intrusive rock because it’s magma when

under the Earth’s surface• Magma is hot liquid from minerals

– Called extrusive rock because it’s lava when above the Earth’s surface

Info from:http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.htmlhttp://www.windows2universe.org/earth/geology/ig_intro.htmlPicture from: http://www.rocksandminerals4u.com/igneous_rocks.html

Examples of Igneous Rock

• Pumice• Obsidian• Rhyolite

Info and pictures from: http://www.rocksandminerals4u.com/example_of_igneous_rocks.html

Sedimentary Rocks

• Sediment is broken bits of rock• These rocks form at:– Rivers– Beaches– The ocean– And wherever else sediment collects

Info found at : http://www.windows2universe.org/earth/geology/sed_intro.html

Examples of Sedimentary Rock

• Sandstone• Siltstone• Shale

Info and pictures found at: http://www.rocksandminerals4u.com/sedimentary.html

Metamorphic Rock

• Formed by high pressure and high temperature– Possibly where

tectonic plates meet

• Chemically change–Mineral crystals alter

Info and picture from: http://www.windows2universe.org/earth/geology/meta_intro.html

Examples of Metamorphic Rock

• Quartzite• Marble• Slate

Pictures found at: http://www.rocksandminerals4u.com/metamorphic.html

How It Works

Picture from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

How are the rocks related?

• Igneous rock– Can change into sedimentary or

metamorphic

• Sedimentary rock– Can change into igneous or

metamorphic

• Metamorphic rock– Can change into igneous or sedimentary

Info from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Changes in Igneous Rock

• How does it turn into sedimentary?– Sediments come from weathering and

erosion of igneous rock– Sediments compact and cement into

sedimentary rock

Info from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Changes in Igneous Rock

• How does it turn into metamorphic?– High heat and pressure

Info from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Changes in Sedimentary Rock

• How does it become igneous rock?– By weathering and

erosion

• How does it become metamorphic?– High heat and

pressure from Earth

Info from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Changes in Metamorphic Rock

• How does it become igneous rock?–Melting into magma then cooling

• How does it become sedimentary rock?– Eroding into sediments and then being

compacted

Info and picture from: http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

Why are rocks important?

• Fossils!• Remind us of the

Earth changing– Heating, pressure,

cooling

• Around for thousands of years– Older than you!Info from: http://www.rocksandminerals4u.com/what_is_a_rock.html

It’s also important for…

Rock, Paper, Scissors!

The End