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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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