| A | B |
|---|
| weathering | the breakdown of rock at or the earths surface into smaller pieces. |
| mechancial weathering | when rock is broken or weakened physically |
| frost wedging | when water expands insides a crack, it widen and sooner or later splits the rock |
| chemical weathering | altering rocks chemical makeup by using new chemical elements |
| acid rain | chemicals that have been combined with polluted air and water vapor to fall back to earth as acid |
| erosion | the moving of weathered materials like gravel, sand or soil; sediment |
| agenst of erosion | wind, water and glaciers |
| sediment | small particles of soil, sand, an gravel that erode |
| delta | low lying plain that is formed at the mouth of a river |
| dust bowl | this was when so much fertile soil blew away from the farming fields, it created a desert. |
| loess | windblow deposits of mineral rich dust and silt |
| glaciers | huge slow moving sheets of ice |
| morains | ridged piles of rocks and debris |
| u shaped valleys | valleys that are carved out |
| v shaped | valleys that are cut out from water hitting its sides |
| ice age | this was when immense glaciers covered a third of earths surface |
| continental glaciers/ icesheets | wide, flat glaciers |
| valley/alpine glaciers | valley glaciers are sent out by moutain snowfields. Alpine glaciers occur in high lattitudes. |
