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PCS Earth Science

Chapter 7 Review

TermDefinition
________________ 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
Created by: Ms.Sala