The Rock Cycle

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GeologyThe study of Earth’s structure, processes, and history

ErosionThe process of water/ice/wind breaking down rocks and carrying them away

Vocabulary ReviewRaise your hands to define the following

words.

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Let’s talk about… Uniformitarianism!

Pronunciation Practice:Uni-form-i-tar-ian-ism

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James Hutton, a Scottish doctor and farmer, came up with it

The principle that geologic processes that happen today also happened in the past

What does that mean?Earth is A LOT older than people thought!

Uniformitarianism

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Types of Rocks

Intro Video: https://www.youtube.com/watch?v=pm6cCg_Do6k (4:30)

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Formed when magma or lava cools

The appearance depends on whether it cooled above or below the surface

(Magma = below the surface; Lava = above the surface)

Igneous

Obsidian Pumice6

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Made when sediments pressed together to form solid rock

Sediment: small bits of rock, minerals, and remains of plants and animals

Sedimentary

Rainbow BasinNear BarstowA “syncline”

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forms when existing rock is changed by heat, pressure, and/or chemical reactions

Usually happens deep underground

Metamorphic

Marble

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Forces that build, change and destroy rock, such as:ErosionDeposition: streams carry broken

bits of rock to the sea or lakesHeat and Pressure: can bend and

cause chemical changesMelting: Deep in the Earth heat and

pressure are so great that the rocks melt completely

Volcanic Activity

The Rock Cycle

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Glue in the ½ sheet of paper Draw arrows between rocks to represent the Rock Cycle

Use page 271 in book and the poster

Activity Time!

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A) erosionB) heat and pressureC) depositionD) precipitation

What might cause rocks to bend?

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B) Heat and pressure

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