Weathering
What is weathering?
The physical and chemical processes that change objects on the Earth's surface over time.
(Break it Down)
What is Erosion?
The removal and transport of weathered material from one location to another.
(Move Around)
What is Deposition?
The laying down or settling of eroded material.
(Lay it down)
What is a landform?
A natural feature on the Earth's Surface.
What is rounding?
As rocks bump into one another, it causes the rocks to break down into a round shape.
At what pH is water classified an Acid? What Causes Acid Rain?
pH of below 7.
Acid rain is caused by the build up of carbon dioxide in the atmosphere. The clouds/water vapor takes in the Carbon causing the pH to change, and creating Acid Rain.
What controls the rate of erosion?
How fast or slow the wind or water is moving.
What causes deposition?
As wind or water slows down, it has less energy and can hold fewer sediments causing the sediments to be laid down, or deposited.
How are the beaches formed?
The ocean deposits sand and rocks on our coastlines.
What is the definition of a Meander?
A broad, C-shaped curve in a stream.
Name two causes of physical weathering and explain how they break down rocks.
Ice Wedging - Water gets into the cracks of rocks. As the water freezes, it forces the rocks to expand and break apart.
Abrasion - The breakdown of rock due to friction. Rocks grinding away by colliding with one another.
Plants: The roots break down rocks.
Animals - Dig into rocks causing them to break down.
Explain how rocks are sorted.
What kind of rocks form over time due to deposition?
Sedimentary Rocks.
As layers of sediments compact together, they form sedimentary rocks.
How does groundwater create landforms underground?
As acid rain seeps into the ground, it causing chemical weathering to take place underground. As this happens the acidic water dissolves and washes away the limestone creating caverns.
What is the definition of a Delta?
A large deposit of sediment that forms where a stream enters a large body of water.
What is Oxidation? What happens during Oxidation?
Oxidation happens when oxygen from the atmosphere combines with other elements in a rock.
Oxidation causes rocks to change to an Orangy Red color. (Rust color)
How do glaciers cause erosion?
As glaciers move slowly, they grab sediments and cause them to move.
What do we call an area that constantly receives deposited materials?
Deposition environment, or deposition landforms.
What are the three types of steams we discussed and how are they different?
Young Stream - Creates V-shaped valleys, and flow rapidly downhill.
Mature Stream - Slower-moving stream that erodes the sides of a stream channel more than the bottom creating a C shaped curve.
Old stream - Moves extremely slow, and is on flat land. It has many different bends/curves.
What is the definition of a Longshore current?
A current that flows parallel to the shoreline.
What is the difference between physical weathering and chemical weathering?
Physical weathering is the natural breakdown of rocks into smaller pieces.
It does not change the chemical makeup of a rock.
Chemical weathering changes the materials that are part of the rock into new material.
Changes the chemical makeup of a rock.
Come up with your own example of Erosion that happens in Florida.
Answers may Vary.
Beaches
Explain how deposition and erosion work together.
Name 3 different Landforms that are found in Florida.
Rolling Hills, Beach Barriers, Winding Waters, Glaciers, Freshwater Lakes, Wetlands, Coral Reefs.
What is the difference between a Dune and a Loess?
A dune is a pile of wind-blown sand. Loess is a crumbly, windblown deposit of silt and clay.