These transport materials and carve away rock as they melt.
What is a glacier?
100
This process takes rock from one place to another.
What is erosion?
100
This changes the materials that rocks and soils are made out of often causing rocks to turn red.
What is chemical weathering?
100
The actual molecular breakdown of minerals.
What is biological weathering?
100
The breaking of rocks into smaller and smaller pieces.
What is physical/mechanical weathering?
200
These are created on the mountainside causing rounded hollows like a bowl. Hint: We have one on our Ben Lomond.
What is a cirque?
200
The rock that is moved from one place to another.
What is sediment?
200
Makes rocks softer.
What is oxidation?
200
These live on rocks and slowly eat away at the surface. You find more of these where the air is humid and cooler.
What are lichens?
200
Sudden changes in temperature - extreme cold or heat.
What is the main cause of physical weathering?
300
These extend from the poles and covered most of Canada and the much of the Midwestern United States at one time.
What is a glacial ice sheet?
300
The reason erosion takes place.
What are water, wind and ice?
300
Causes rocks to expand and is the beginning of mechanical weathering.
What is hydrolysis?
300
How much life is in the area
What affects the amount of biological activity that breaks down minerals?
300
Water collects in cracks in rocks during the day and at night the temperature drops which causes the water to freeze and expand increasing the size of the crack in the rock.
What is freeze-thaw action?
400
This makes glaciers unique.
What is their ability to move?
400
This happens on the slow side of river banks.
What is deposition?
400
Iron in the rocks cause them to rust and the rust expands and weakens the rock.
What is oxidation?
400
They speed up the development of fissures or cracks in the rock.
What are burrowing animals such as moles, squirrels and rabbits?
400
Roots and rocks push into the rocks and break them apart acting like this.
What is a wedge?
500
The amount of land glaciers currently cover.
What is 10% of the world's total land area?
500
Big holes that can be created in the rock due to erosion.
What is a cave?
500
Higher temperatures
What increases the rate of chemical weathering?
500
Trees and other plants that have roots that penetrate into the soil.
What can wear away rocks as they penetrate into the soil and make cracks wider and deeper by placing pressure on the rocks?
500
Rain water filled with ions and salt dissolve inside the rock and create crystals that act like a wedge and crack the rocks.