Glaciers that cover broad areas of land, stretching over 100s of miles are called...?
Continental glaciers!
What type of dune forms transverse dunes when there is lots of sand?
Barchan dunes
Which of the following has the fastest movement: creep, mudflow, or avalanche?
Avalanche!
Glaciers deposit unsorted ridges ridges of till called...?
Moraines
What is abrasion?
Abrasion is the process of erosion that occurs when particles such as sand rub against the surface of rocks or other materials.
Explain why slumps and other mass movements are common after heavy rainfall
Water reduces the amount of friction between soil particles
Glaciers covered 30% of Earth during the last ice age, which began...
About 2.6 million years ago!
What type of dune is likely to form when wind direction changes often?
Star dunes
Objects that were once vertical, such as trees and lampposts, are now at an angle.
Where are large deposits of loess primarily found?
Large deposits of glacial loess are primarily found in the Midwestern United States.
What is a deep, round depression, scooped out by a valley glacier?
A cirque!
What are rocks shaped by wind abrasion called?
Ventifacts
Parallel grooves in bedrock are a sign of what type of mass movement?
A glacier with embedded rocks
What is the BEST way for humans to avoid danger from mass movements?
Avoiding building on or below slopes!
Sometimes, a large block of ice breaks off a continental glacier and the surrounding area is covered by sediments. When the block melts, it leaves behind a depression called ____________.
A kettle or kettle lake