When yearly evaporation is greater than yearly precipitation.
What is a desert?
100
Type of rock that is often dissolved by ground water resulting in the formation of caves.
What is limestone?
200
Large isolated pillars that remain after an arch collapses.
What are arches?
200
Large crack in the glacier.
What is a crevasse?
200
This is important in stabilizing slopes
What is vegetation?
200
Deep hollows created by deflation.
What are blowouts?
200
Feature that grows down from the ceiling of a cave.
What is stalactite?
300
the zigzag movement of sand along the beach.
What is longshore drift?
300
The two ways that glaciers erode.
What is plucking and abrasion?
300
Also Known as a lahar when it involves volcanoes.
What is a mudflow?
300
Wind blown dust that create extremely fertile agricultural soils.
What is loess?
300
Rock layer that can hold a substantial amount of water within it.
What is an aquifer?
400
Man made structures used to keep as much sand on a beach as possible.
What are groynes?
400
Two benefits of glaciers.
What is Hydroelectric power, fresh water, tourist attractions, cols for transportation, sand and gravel deposits, rich soils, valuable waterways for shipping.
400
A slow moving type of mass wasting. Often results in fences that are no longer vertical.
What is soil creep?
400
Flat table topped feature that is smaller than a mesa.
What is a butte?
400
The top of the zone of saturation.
What is the water table?
500
The four ways that coastline erosion is generated by waves.
What is corrosion, corrasion (abrasion), attrition, hydraulic action?
500
Arm chair shaped depression in a mountain side as a result of alpine glaciers.
What is a cirque?
500
Three ways to stabilize a slope.
What is long bolts, concrete sprayed on, wire mesh, pipes to drain away water, terraces, retaining walls, tunnels, snowsheds.
500
the four factors that cause deserts to form.
What is latitude, mountain barriers, cold-ocean currents, and ocean influence?
500
Aquifer in the United States that is almost gone as a result of overuse.