Earths Changing Surface WED Flashcards
What are the Two types of weathering?
Mechanical & Chemical
What is an example of Mechanical Weathering.
Rocks broken apart by physical process
- growing plants
- Freeze thaw cycles of water
- burrowing animals
What is chemical weathering and Give examples of Chemical Weathering.
Chemicals change things into different materials or dissolve the rocks
Acid rain
-oxidation
- plant acids
What is weathering?
Process that works to break down rocks
What are the factors that weathering depends on?
Materials (strength or structure)
Temperature and humidity
Soil type
What is oxidation?
It happens when oxygen combines water to make rust
Name the four agents of erosion.
Water, Wind, Gravity, and glacier
What is erosion?
A process that moves sediment from on place to another
What is deposition?
The laying down of eroded sediment
Name the 3 formations of deposition.
Deltas & Alluvial Fans
Flood plains
Meanders & Oxbow Lakes
Give an example of a delta.
Nile River delta
What are deltas and Alluvial Fans
Fan shaped deposits at the mouths of the rivers
What is a flood plain?
Level strips of land on the sides of a river ,sediments deposited during flooding
What is a Meander and oxbow lake?
A meander is a bend in the river
An oxbow lake is a meander that gets cut off from the river
Give an example of water erosion.
Grand Canyon
A mudslide flowing down a steep hill is?
Erosion
Glaciers scraping rocks across the Earths surface is?
Erosion
Rain washing away soil from a hillside is?
Weathering
Flood water pounding against a canyon wall and wearing it down is?
Weathering
Waves dropping sand on the beach is?
Deposition
Layers of sediment forming at the bottom of the ocean is?
Deposition
What is a topographic map?
A two dimensional model of the earths surface
Is Weathering constructive or destructive
Destructive
