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landforms and soil
science vocab
17
Science
8th Grade
01/16/2013

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Term
Constructive forces
Definition
forces that build rocks(metamorphism,lithification, crystallization)
Term
destructive forces
Definition
forces that break rocks down(weathering and erosion)
Term
weathering
Definition
the breaking down of rocks and other materials on the earths surface.
Term
mechanical weathering
Definition
when forces of weathering break rocks into smaller pieces but do not change the rocks chemical makeup.
Term
chemical weathering
Definition
weathering that involves change in the chemical makeup or rocks
Term
stable rock
Definition
when the minerals on a rock resist chemical weathering the rock is stable
Term
different weathering
Definition
when softer,less weather resist rocks wear away faster than harder more weathered resistant rocks do
Term
erosion
Definition
the process by which weathering rock and soil particles are moved from one place to another
Term
depposition
Definition
the process by whick sediments are laid down in new locations
Term
soil
Definition
pieces of weathered rock,organic material,air and water
Term
humus
Definition
decaying plant and animal matter
Term
topsoil(mature soil)
Definition
consists mostly of humus and other organic material
Term
topography
Definition
the shape of the earths surface
Term
landscape
Definition
physical features of the earths surface
Term
moutains
Definition
natural land forms that reach high elevations
Term
plains
Definition
flat land areas that do not rise above sea level
Term
plateas
Definition
brood flat areas of land that rise more than 600m above sea level.
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