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Story in the Rocks!!! . By: Kara Brueggemeier , Ann Wolf , and Tristan McMullen . Weathering. Chemical weathering – a reaction Physical weathering – it is carving ex. The Grand Canyon Sediment is the result of weathering. Erosion. Running water is the main agent of erosion - PowerPoint PPT Presentation
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Story in the Rocks!!! By: Kara Brueggemeier , Ann Wolf
, and Tristan McMullen
Chemical weathering – a reaction
Physical weathering – it is carving ex. The Grand Canyon
Sediment is the result of weathering.
Weathering
Running water is the main agent of erosion
The Grand Canyon was formed by the Colorado River
Gravity causes eroded material to slide downhill
Sheet erosion is when rain washes away a layer of topsoil
Erosion
Erosion – the lifting and physical removal of rock particles, dirt, and sand
Deposition – the laying down of matter by a natural process
Sediment – solid fragments of inorganic or organic materials that come from weathering
Gravity – the force of attraction that exists between two particles of matter or objects
Weathering and Erosion Vocabulary
It is the cycle that rocks go through
3 different ways are cooling, crystallization, and melting.
3 types are: Sedimentary, Igneous, and Metamorphic.
The Rock Cycle
It is rock that is formed from cooling lava
One type is extrusive igneous rock – it is rock that forms on the outside of volcanoes
Another is intrusive igneous rock – it is rock that hardens inside of the volcano
Igneous Rock
It is a rock that is made up of other rocks and particles of sand.
It is formed when deposited sediment hardens
Fossils are most likely found in this rock
Sedimentary Rock
It is rocks that were changed by heat and pressure.
They used to be sedimentary and igneous rock
Metamorphic Rock
It states that the oldest rocks are normally on the bottom layers, and the more recent ones are on the top.
If there where ocean animal fossils on a hill it would mean that that area was once an ocean
Law of Superposition
It is a time scale that shows the different eras and what animals lived during that time period.
Geologic Time Scale
It is the remains of a dead organism
Fossils are, most likely, found in sedimentary rock
The law of superposition tells us how old a fossil is
Fossils!!!!!!!!
Some websites we liked and thought were very informative were
http://www.answers.com because it was neat and easy to read
-weathering and erosion link- filled with information and very straight forward.
Vulcan.wr.usgs.gov/livingwith/volcanicpast/notes/igneous_rocks.html – provides a lot of in-depth info on igneous rocks
Geomaps.wr.usgs.gov/parks/rxmin/rock2.html – because it has a lot of info
Website Resources
The END!!!!!!!!!