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PCS Earth Science
Chapter 7 Review
Term | Definition |
---|---|
________________ breaks down materials on or near Earth's surface. | weathering |
Mechanical weathering changes a rock's ________ and shape. | size |
Frost wedging and exfoliation are forms of _____________ weathering. | mechanical |
_______________ weathering changes the composition of a rock. | chemical |
The rate of chemical weathering depends on the climate, rock type, surface area, and ___________. | topography |
_______________ transports weathered materials across Earth's surface until they are deposited. | erosion |
The processes of erosion and ______________ deposition have shaped Earth's landscape in many ways. | deposition |
_____________ is driving force behind major agents of erosion. | gravity |
What are agents of erosion? | running water, waves, glaciers, wind, and living things |
___________ forms slowly as a result of mechanical and chemical processes. | soil |
Soil consists of weathered rock and _________. | humus |
Soil is either residual or ______________. | transported |
A typical soil profile has what horizons? | O, A, B, and C |
What five factors influence soil formation? | climate, topography, parent material, biological organisms, and time |
What are soil characteristics? | texture, fertility, color |
Weathering | the process of breaking down and changing rocks on or near Earth's surface |
Erosion | the removal of weathered materials from a location by running water, wind, ice or waves |
Exfoliation | the fracturing of rock along curved lines that results when pressure is removed from bedrock |
The occurrence of parallel scratches on bedrock in a U-shaped valley indicates that the area has most likely been eroded by __________> | a glacier |
Unsorted, angular, rough-surfaces cobbles and boulders are found at the base of a cliff. What most likely transported these cobbles and boulders? | gravity |
Which activity demonstrates chemical weathering? | dissolving of limestone by acid rain |
Which factor has the greatest influence on the weathering rate of Earth's surface bedrock? | regional climate |