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Earth Science Gr7

Chapter 5

TermDefinition
weathering the mechanical and chemical processes that change Earth's surface over time
mechanical weathering physical processes that naturally break rocks into smaller pieces
chemical weathering the process that changes the composition of rocks and minerals due to exposure to the environment
oxidation the process that combines the element oxygen with other elements or molecules
soil mixture of weathered rock, rock fragments, decayed organic matter, water, and air
organic matter remains of something that was once alive
pore small hole or space in soil
decomposition the breaking down of dead organisms and organic waste
parent material that starting material of soil consisting of rock or sediment that is subject to weathering
climate long-term average weather conditions that occur in a particular region
topography the shape and steepness of the landscape
biota all of the organisms that live in a region
horizon layer of soil formed from the movement of the products of weathering
Created by: carriel
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