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When does weathering and erosion stop?
Never!
Define chemical weathering.
The process by which chemical reactions break down rocks and change them into new material.
Define erosion.
The removal of weathered material from one location to another.
Define deposition.
The settling or laying-down of eroded materials.
Define physical weathering.
The process of physical forces breaking down rock into smaller pieces.
What kind of erosion is most common in a desert?
Wind
What is the main hint that chemical weathering has occurred on a rock?
Color change.
How does does a steeper gradient (slope) impact erosion?
A steeper gradient increases the rate of erosion.
How does gravity affect erosion and deposition?
Gravity pulls objects down, so eroded material typically moves and deposits, or settles, towards the ground.
What are the main forces that contribute to physical weathering?
Water and wind.
What kind of weathering is more common in colder climates?
Mechanical - Ice Wedging
Name a type of chemical weathering.
Oxidation or acid precipitation
Describe the process of beach erosion.
Waves continually crashing against a beach cause the sand to be eroded away and carried out into the ocean, diminishing the size of the beach.
Name a landform that is a result of deposition.
Several correct answers.
How are physical and chemical weathering similar?
They both break down rocks.
What kind of weathering is more common in warmer and wetter climates?
Chemical
What does acid rain do to rocks?
Rain with a low pH from pollution dissolves rocks and increases the rate of chemical weathering.
Describe the relationship between weathering, erosion, and deposition.
Weathering breaks down rocks into sediment, erosion moves the sediment to a different location, and deposition is the process of that sediment settling in the new location.
How is erosion different from deposition?
Erosion is the process of moving sediment, while deposition occurs after and is the process of settling down the eroded material.
Describe the process of abrasion.
The grinding away of rock by friction or impact, usually by water or wind.
What are some landscapes that occur because of erosion?
Answers May Vary
How is chemical weathering different from physical weathering?
Chemical weathering changes the substance of rocks into something new, while physical weathering breaks rocks into smaller pieces.
Define discharge and state how it impacts erosion.
Discharge is the volume of water flowing through a river or stream, so an increase in discharge would increase erosion.
Describe how erosion and deposition work together to create sand dunes.
Wind erosion moves sand on beaches, and deposition is the process of the sand settling into a mound, or dune, on the beach.
Describe the process of pothole formation and identify the type of physical weathering it is.
Ice wedging - water enters cracks in roads and expands when it freezes, widening the cracks and eventually creating holes in the road.