Rocks How They Are Made By Mr. Haynes. Volcanoes Volcanoes are made of many things that make rocks....
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Transcript of Rocks How They Are Made By Mr. Haynes. Volcanoes Volcanoes are made of many things that make rocks....
![Page 1: Rocks How They Are Made By Mr. Haynes. Volcanoes Volcanoes are made of many things that make rocks. The three parts of a volcano are magma, lava, and.](https://reader030.fdocuments.us/reader030/viewer/2022032521/56649d5d5503460f94a3bc04/html5/thumbnails/1.jpg)
Rocks
How They Are Made
By
Mr. Haynes
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Volcanoes
• Volcanoes are made of many things that make rocks.
• The three parts of a volcano are magma, lava, and the crust.
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Magma is molten rock below ground.
Magma is extremely hot! Great pressure from under ground pushes the magma to a crack in the crust of the earth. Then a volcano forms.
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The volcano erupts.
• Lava is molten rock above ground.
• Lava shoots out of the volcano and runs down the crust.
• The crust is the side of the volcano.
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Lava is extremely hot!
When the lava cools, it turns into different forms of rocks.
There are three forms of rock. They are igneous, sedimentary, and metamorphic.
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Igneous rock forms when magma cools above or below ground.
• Granite is an igneous rock with shiny speckles. It is a very heavy rock.
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Sedimentary rock is formed when tiny bits of rock are pressed together underwater.
• Most fossils are found in sedimentary rocks.
• Sedimentary rock is made over millions of years at the bottom of lakes and rivers.
• Sandstone is a sedimentary rock.
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Metamorphic rocks are rocks that have been changed by
heat, pressure, and millions of years. • Metamorphic rocks were
once sedimentary or igneous rocks.
• Quartz is a metamorphic rock.
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3 Types of Rocks
• Igneous- formed when magma cools
• Sedimentary- formed when tiny bits of rock are pressed together
• Metamorphic- formed when rocks are changed by heat, pressure, and time
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