Coastal Weathering And Erosion Flashcards
Mechanical Weathering is the _______________ of Rock without Changing its ______________ Composition.
Breakdown…Chemical…
What is the Main Type of Mechanical Weathering that Affects Coasts?
Salt Weathering.
Formation of Salt Weathering?
- Seawater Gets into Cracks in the Rock.
- When the Water Evaporates, Salt Crystals Form. As the Salt Crystals Form they Expand, which Puts Pressure on the Rock.
- Repeated Evaporation of Saltwater and the Forming of Salt Crystals Widens the Cracks and Causes the Rock to Break Up.
What is Chemical Weathering?
The Breakdown of Rock by Changing its Chemical Composition.
What is a Type of Chemical Weathering that Happens in Warm and Wet Conditions?
Carbonation Weathering.
Formation of Carbonation Weathering?
- Seawater and Rainwater have Carbon Dioxide Dissolved in them, which makes them Weak Carbonic Acids.
- Carbonic Acid Reacts with Rock that Contains Calcium Carbonate, so the Rocks are Dissolved by the Rainwater.
What is Biological Weathering?
The Breakdown of Rock by Living Things.
What is Mass Movement?
When Materials Fall Down a Slope.
Mass Movement Happens when the Force of __________ Acting On a Slope is __________ Than the Force Supporting It.
Gravity…Greater…
Mass Movement can Cause Coasts to ___________ Rapidly.
Retreat.
What are the Three Types of Mass Movement?
- Slides.
- Slumps.
- Rockfalls.
What Happens in the Mass Movement of a Slide?
Material Shifts in a Straight Line.
What Happens in the Mass Movement of a Slump?
Material Shifts with a Rotation.
What Happens in the Mass Movement of a Rockfall?
Material Breaks Up and Falls Down Slope.
What are the Three Processes of Erosion?
- Hydraulic Power.
- Abrasion.
- Attrition.
