Weathering
What are 2 types of weathering?
chemical and physical weathering
What is erosion?
Erosion is the carrying away or moving rocks and sediment to a new location
T/F - Rocks weather evenly
False - Rocks have different hardnesses causes them to weather unevenly
What is deposition?
When rocks and sediment are dropped or deposited in a new place.
In which horizon do plants grow?
Topsoil or A horizon
What is the process called when water gets into a crack in the rock and freezes?
frost wedging
What is an example of wind erosion
Wind blowing sand from a sand dune to another location ( sand storm)
What is weathering?
Weathering is the process of breaking down and weakening sediments that will be moved by erosion.
T/F - Deposition happens during erosion
True
list the soil particles in order from smallest to largest
clay, silt, sand
What is an example of chemical weathering?
acid rain
Erosion can be caused by what 3 kinds of weathering?
1. Wind 2. Ice 3. Water
What term describes the process of rock peeling away in sheets?
Exfoliation
why does deposition have a layered look?
the heavy sediment drops first and the lighter sediments drop on top
Which type of soil would be best for a garden?
Sand, silt or clay?
silt
this cave feature hangs from the ceiling and looks like stone icicles
stalactites
While driving along the highway in Pennsylvania I noticed huge rocks along the highway. Large nets covered these rocks and seemed to go from the top to the bottom. Were these nets put in place to stop weathering or erosion?
erosion: even when rocks become broken they can not be carried or moved to another location
Give and example of water erosion
An example of water erosion is when a river pulls sediment and small rocks from the riverbanks and carries it all down stream to another place.
a rockslide is them movement of many large slabs of rock rather than of a few rocks and soil, as in an earth flow
List 4 things that make up soil (not just the different soil particles)
water
air
humus
soil particles - sand, silt, clay
How do burrowing animas contribute to mechanical weathering
they move rocks and expose more of the rock
what can cause wave erosion to be greater or more forceful?
storms or weather
What is an example of ice erosion
An example is when a glacier scrapes rock and sediment as it moves down hill, and leaves it in a different location
what are the 5 types of mass movements
soil creep
earth flow
mudflow
rockslide
avalanche
What determines the composition and fertility of soil?
kinds of weathered rock
climate
vegetation