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Rockin ’ the Rock Cycle. Starring Sedimentary, Igneous and Metamorphic Rock. The Rock Cycle is a continuous process where any type of rock can be changed into any other type of rock . What are Rocks?. Rocks: naturally occurring solids that are made of two or more minerals

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Rockin the rock cycle

Rockin’ the Rock Cycle

Starring Sedimentary, Igneous and Metamorphic Rock


The Rock Cycle is a continuous process where any type of rock can be changed into any other type of rock.


What are rocks
What are Rocks? rock can be changed into any other type of rock

  • Rocks: naturally occurring solids that are made of two or more minerals

  • There are three types of rocks based on how they are formed on Earth:

    • Igneous

    • Sedimentary

    • Metamorphic

Granite - Igneous

Marble - Metamorphic

Shale - Sedimentary


The rock cycle
The Rock Cycle rock can be changed into any other type of rock

  • Rocks are constantly being made and recycled to form other types of rocks. This is called the Rock Cycle.

  • You can start at any place and follow the life of a rock.

  • We will start with igneous rock.


Igneous rock
Igneous Rock rock can be changed into any other type of rock

  • Igneous rock is made when magma cools and crystallizes. (Igneous means “from fire or heat”)


Examples of igneous rock
Examples of Igneous Rock rock can be changed into any other type of rock

Granite: Large/Course Grains

Basalt: Small/Fine Grains

Obsidian: Glassy/Very Fine

Grains


What type of igneous rock
What Type of Igneous Rock?? rock can be changed into any other type of rock

A. B.

C. D.


What can happen to the igneous rock
What can happen to the Igneous Rock? rock can be changed into any other type of rock

1. It can be weathered and eroded and turned into small pieces, called sediment, which can then be turned into a sedimentary rock.

2. It can be put under high heat or pressure and form a metamorphic rock.

  • Could melt and become magma again = igneous rock

     We will move to sedimentary rocks next!


Becoming a sedimentary rock
Becoming a Sedimentary Rock rock can be changed into any other type of rock

  • Weathering is the breaking down of rock on Earth’s surface physically or chemically

  • Physical Weathering: Breaks rock into smaller pieces. Examples- Tree Roots breaking apart rocks, Water freezing inside cracks of rocks causing them to expand and break

  • Chemical Weathering: Involves chemical reactions that change the rock. Example- Acid Rain on gravestones (dissolves minerals)



Becoming a sedimentary rock1
Becoming a Sedimentary Rock rock can be changed into any other type of rock

  • Erosion – sediments are transported by wind or water

    3. Deposition – when the sediments stop moving. This produces different types of “bedding”


3 deposition types of bedding
3. Deposition – Types of Bedding rock can be changed into any other type of rock

  • Bedding – oldest sediments on the bottom, youngest sediments on top

    2. Graded Bedding – biggest sediments on bottom, smallest on top (happens in water)

    3. Cross Bedding – sediments are laid at an angle (ex: sand dunes)


Finally becoming a sedimentary rock
Finally Becoming a Sedimentary Rock! rock can be changed into any other type of rock

4. Lithification - Sediments must be buried, compacted, cemented together to make a sedimentary rock.

  • Examples of Sedimentary Rock:

CoalSandstoneShale


Where we ve been
Where We’ve Been… rock can be changed into any other type of rock


What can happen to sedimentary rock
What can happen to Sedimentary Rock? rock can be changed into any other type of rock

1. Could weather and erode to become sediments = sedimentary rock

2. It can be put under high heat or pressure and form a metamorphic rock.

  • Could melt to form magma = igneous rock

     We will move to metamorphic rocks next!!


Metamorphic rocks
Metamorphic Rocks rock can be changed into any other type of rock

  • Formed from existing rocks.

  • Are created by intense heat or intense pressure.

  • Can be foliated = looks like it has layers (made from pressure)

  • Can be non-foliated = does not look like it has layers (made from heat)


Examples of metamorphic rock
Examples of Metamorphic Rock rock can be changed into any other type of rock

Limestone (Sedimentary)  Marble

Shale (Sedimentary)  Slate

Granite (Igneous)  Gneiss


What can happen to metamorphic rock
What can happen to Metamorphic Rock? rock can be changed into any other type of rock

  • Could weather and erode to become sediments = sedimentary rocks

    2. Could melt to form magma = igneous rocks


In summary
In Summary… rock can be changed into any other type of rock

  • The Rock Cycle is the continuous making and remaking of rocks

  • All rocks can become other types of rocks

  • The three types of rocks are: Igneous, Sedimentary, and Metamorphic

    • Igneous Rocks are made by magma

    • Sedimentary Rocks are made by sediments

    • Metamorphic Rocks are rocks exposed to heat or pressure

    • Interactive Rock Cycle


The importance of rocks
The Importance of Rocks rock can be changed into any other type of rock

  • Granite (I) is widely used in homes and buildings and is the “state rock” of N.C.

  • Marble (M) makes up the Lincoln Memorial and is used in flooring

  • Limestone (S) is used in construction

  • The State Capitol Building is made of Gneiss (M)

  • Coal (S) is an energy source


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