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40 Cards in this Set

  • Front
  • Back
a breakdown process
breakdown of rock into physical pieces by physical means
mechanical weathering
expands when it frezzes
water seeps into cracks in rocks and frezzes ans expands
ice wedging
rocks grinding against eachouther and wearing away exposed sufaces
plant roots find there way into rocks and then cracks get bigger
earthworms can move up to 100 metric ton a year
chemical breakdown of rocks and minerals into new substances
chemical weathering
carbonic acid sulfuric acis and nitric acid are found in precitpitation
acid precipitation
what are the three types of acid precipitation
carbonic acid sulfuric acis and nitric acid
contains acid dut to air pollution
acid precipitation
may contain weak acids carbonic and sulfuric acid
licheans produce organic acids that can slowly breal down rock
acid in living things
a chemical reaction in which an element such as iron combines and forms with oxygen to form an oxide
is the process by which softer less weather resistant rock wear away leaving harder more resistant rock
differental weathering
what is an example of differental weathering
devils tower
occurs on outside surface of rocks.
shapes of weathering
oxidation occurs more in humid enviormennts
weathering and climate
rocks at higher elevation are exposed to severe weather and the process of weathering increases
weathering and elevation
a losses mixture of small fragments and organic material
the layer of rock beneath the soil
the rock that is the source of thte soil
parent rock
soilt hat remains above the bedrock were it was formed
residual soil
soil deposited away from the area where it was formed
transported soil
small particals of decayed plant and animal material
horizontal layer of soil
top layer of soil
top soil
heavy rain casues nutrients to leach from topsoil quickly and constantly. very thin topsoil
tropical climate
very low water => low rates of chemical weathering. ex. death valley
desert enviorment
much mehanical and chemical weathering. thick fertile soil developes
teperate climate
similar to desert enviorment. little precipatation
arctic climate
various methods by which humans take care of the soil
soil conservation
contains nutrients nessacary for plants
soil provides a place for animals to live
soil holds water
process by which wind and watertransport soil and sediment from one location to another
planted between harvests to reduce soil erosionand to replace certain nutrients
cover crops
crops planted in areas are changed from year to year
crop rotation
plowing across the slope of a hills instead of up and down the hills
countor plowing
used on steep hills. changes them into a series of flat fields