Date post: | 13-Jan-2016 |
Category: |
Documents |
Upload: | cornelia-tucker |
View: | 215 times |
Download: | 1 times |
THE ROCK THE ROCK CYCLECYCLE
Important termsImportant terms
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
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)
Mechanical Mechanical WeatheringWeathering Mechanical Weathering Video
Mechanical Mechanical WeatheringWeathering
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
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
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
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
Chemical Chemical WeatheringWeathering
Chemical Weathering Video
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:
WaterWater
Over time, Over time, water water gradually gradually dissolves many dissolves many minerals minerals
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
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)
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:
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
The Power of WindThe Power of Wind
https://www.youtube.com/watch?https://www.youtube.com/watch?v=PQmon7Rj6ns v=PQmon7Rj6ns
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
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
IceIce
Glaciers Glaciers (enormous mass (enormous mass of moving ice) of moving ice) can move large can move large amounts of rockamounts of rock
The Power of IceThe Power of Ice
https://www.youtube.com/watch?https://www.youtube.com/watch?v=IScnw7nt2Sw v=IScnw7nt2Sw
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
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
To Sum Up:To Sum Up:
https://www.youtube.com/watch?https://www.youtube.com/watch?v=lyysL02ZvQ8 v=lyysL02ZvQ8