Rocks & Erosion
the process of rock changing from one type to another is called _________________
rock cycle
layers of soil
horizons
largest kind of particle in soil
sand
changes rocks in a new substance
chemical weathering
primary force behind erosion
gravity
area of sediment deposited at the mouth of the river
delta
unweathered rock that influences the soil above it ia called ___________
bedrock
most plants germinate and grow roots in this layer
topsoil
mechanical or chemical
exfoliation
mechanical
this forms when unmelted snow gets compacted down into ice
glacier
the dropping of sediment and rocks in a new location
deposition
______________ contains weathered minerals and some nutrients from the humus
subsoil
small particles of weathered rocks and minerals
sediment
process of breaking down rocks
pile of rocks and soil deposited by a glacier
moraine
load
fertile soil that has equal parts of sand and silt combined with about half as much clay
loam
decayed organic material in soil
humus
occurs whenever rocks rub against each other
abrasion
A. moraine
B. deflation
C. rockslide
D. sand dune
rockslide
the process of wind picking up loose sediment and carrying it away
deflation
the amount of each kind of particle in a soil sample
texture
when gravity is the primary force that moves rocks and sediment
mass movement
mechanical or chemical?
pressure release
mechanical
3 categories of rocks
metamorphic, sedimentary, igneous