Erosion and Weathering Flashcards
Ocean waves breaking up large rocks and shells into sand is an example of what?
Weathering
Large mountains becoming shorter over time is an example of what?
Weathering
What is the transport of weathered materials from one place to another called?
Erosion
Canyons, valleys, and cliffs are caused by what?
Erosion
When erosion is caused by glaciers, what happens the surface below?
The abrasion causes the surface to be polished or striated.
Which erodes faster? Beach sand or rocks?
Sand
How was the Grand Canyon formed?
Erosion by the Colorado River.
Why does removing plants from a field cause erosion?
Because the soil is no longer held in place by plant roots.
What is deposition?
When sediment begins to settle out of the water.
The FORMATION of sand dunes is an example of what?
Deposition
What can farmers do to keep soil in place to prevent erosion?
They can plant cover crops after harvesting.
What could help a hilly area that is experiencing erosion?
Planting trees
How do ocean currents build beaches?
By moving sand along the coast.
How are deltas built?
By the constructive force of sediment deposition
What do levees do?
The can help reduce flooding
When lava flows and cools, what happens?
A new land feature is formed by the constructive process of lava hardening
How can you see the changes to Earth over time?
By comparing a very old map to a new map.
What is one way people know if an area might flood?
A computer generated map can warn people of flood-prone areas.
Why do rivers meander rather than go in a straight line?
Because flowing water erodes soil from one river bank and deposits soil onto the other.
If you go swimming and notice that the water is shallow where the stream enters the lake and the sediment on the lake bottom is much deeper, what is the cause?
The deep sediment is caused by deposition
What is a kind of polluted rain?
Acid rain
If you pour regular water over limestone, and pour acid water over another piece of limestone, what would happen.
The acid water will break apart the limestone after a while.
