THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown...

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THE ROCK CYCLE THE ROCK CYCLE Important terms Important terms

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Transcript of THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown...

Page 1: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

THE ROCK THE ROCK CYCLECYCLE

Important termsImportant terms

Page 2: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

WeatheringWeathering

The The breakdown of breakdown of rock into rock into smaller piecessmaller pieces

There are two There are two big categories big categories of weatheringof weathering

Page 3: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

Mechanical WeatheringMechanical Weathering

Breakdown of rock into smaller Breakdown of rock into smaller pieces by physical means (by pieces by physical means (by force)force)

Page 4: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

Mechanical Mechanical WeatheringWeathering Mechanical Weathering Video

Page 5: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

Mechanical Mechanical WeatheringWeathering

Page 6: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

IceIce

Water that seeps into cracks in a Water that seeps into cracks in a rock freezes and expands, rock freezes and expands, breaking the rockbreaking the rockhttp://www.phschool.com/atschool/science_activity_library/weathering_freezing.html

Page 7: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

AbrasionAbrasion

The action of rocks and sediments The action of rocks and sediments grinding against each other that is grinding against each other that is caused by:caused by:i).i). Wind blowing sand/sediments Wind blowing sand/sediments

across rocksacross rocks

ii). Water causes rocks to bump along ii). Water causes rocks to bump along each other in a river or streameach other in a river or stream

iii). Gravity causing a landslideiii). Gravity causing a landslide

Page 8: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

PlantsPlants

Plant roots Plant roots enter cracks in enter cracks in rocks and rocks and push the rock push the rock apart over apart over timetime

Page 9: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

AnimalsAnimals

Creatures like Creatures like earthworms, earthworms, ants, and ants, and moles move moles move sediments sediments around, around, exposing them exposing them to the weatherto the weather

Page 10: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

Chemical Chemical WeatheringWeathering

Chemical Weathering Video

Page 11: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

Chemical WeatheringChemical Weathering

Chemical breakdown (at a Chemical breakdown (at a molecular level) of rocks and molecular level) of rocks and minerals into new substancesminerals into new substances

This type of weathering is This type of weathering is caused by:caused by:

Page 12: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

WaterWater

Over time, Over time, water water gradually gradually dissolves many dissolves many minerals minerals

Page 13: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

AcidAcid Acid precipitation = Acid precipitation = rain rain

that contains acids due to that contains acids due to pollution; breaks down pollution; breaks down rocksrocks

Acid in ground water = Acid in ground water = some locations have weak some locations have weak acids in groundwater that acids in groundwater that cancan break down limestone break down limestone and form cavesand form caves

Acid in living things = Acid in living things = lichens produce acids that lichens produce acids that break down rocksbreak down rocks

Page 14: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

AirAir

Oxygen in the Oxygen in the air can cause air can cause rocks rocks containing containing iron to form iron to form rust (iron rust (iron oxide)oxide)

Page 15: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

EROSIONEROSION

The breakdown and transport The breakdown and transport (movement) of sediments, rocks, (movement) of sediments, rocks, and mineralsand minerals

Erosion is caused by 4 major Erosion is caused by 4 major factors:factors:

Page 16: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

WindWind

The blowing of The blowing of sediments sediments (typically (typically small particles small particles like sand)like sand)

Can cause Can cause sand dunes to sand dunes to formform

Page 17: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

The Power of WindThe Power of Wind

https://www.youtube.com/watch?https://www.youtube.com/watch?v=PQmon7Rj6ns v=PQmon7Rj6ns

Page 18: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

WaterWater

Ocean waves Ocean waves change the change the coastlinecoastline

Streams and rivers Streams and rivers move sedimentsmove sediments

https://https://www.youtube.com/www.youtube.com/watch?watch?v=ofhQvAu_L1I v=ofhQvAu_L1I

Page 19: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

The Power of WavesThe Power of Waves

https://www.youtube.com/watch?https://www.youtube.com/watch?v=zUh3WeilFN4&list=PLYfqHMNCuerqqv=zUh3WeilFN4&list=PLYfqHMNCuerqq1-4wfEXMH9l8JTHXjJIr&index=2 1-4wfEXMH9l8JTHXjJIr&index=2

Page 20: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

IceIce

Glaciers Glaciers (enormous mass (enormous mass of moving ice) of moving ice) can move large can move large amounts of rockamounts of rock

Page 21: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

The Power of IceThe Power of Ice

https://www.youtube.com/watch?https://www.youtube.com/watch?v=IScnw7nt2Sw v=IScnw7nt2Sw

Page 22: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

GravityGravity Can cause rocks to shift in Can cause rocks to shift in

landslides or more slowly landslides or more slowly anywhere the ground isn’t levelanywhere the ground isn’t level

https://www.youtube.com/watch?https://www.youtube.com/watch?v=T5wBdZ1x8rE v=T5wBdZ1x8rE

Page 23: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

DEPOSITIONDEPOSITION

Takes place when the sediments Takes place when the sediments moved by erosion finally settlemoved by erosion finally settle

Typically occurs on the ocean Typically occurs on the ocean bottom, a lake bottom, or the bottom, a lake bottom, or the base of a hill/mountainbase of a hill/mountain

Page 24: THE ROCK CYCLE Important terms. Weathering The breakdown of rock into smaller pieces The breakdown of rock into smaller pieces There are two big categories.

To Sum Up:To Sum Up:

https://www.youtube.com/watch?https://www.youtube.com/watch?v=lyysL02ZvQ8 v=lyysL02ZvQ8


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