Solutions for Chapter 18: Air Pollution

A slow motion of Earth’s axis that traces out a cone over a period of 26,000 years.

A stream consisting of numerous intertwining channels.

The area of active erosion on the outside of a meander.

The angular distance north or south of the celestial equator denoting the position of a celestial body.

Radiation with a wavelength from 0.7 to 200 micrometers.

The solid innermost layer of Earth, about 1,300 kilometers (800 miles) in radius.

An isolated mountain remnant characteristic of the late stage of erosion in an arid region.

A lunar rock formed when angular fragments and dust are welded together by the heat generated by the impact of a meteoroid.

A measure of a material’s ability to transmit water.

A highly heated mixture, largely of ash and pumice fragments, traveling down the flanks of a volcano or along the surface of the ground.

A relatively dense dust cloud in interstellar space that is illuminated by starlight.

The ratio of the air’s watervapor content to its water-vapor capacity.

A mechanism that contributes to plate motion in which cool, dense oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along.

A movement common to mass-wasting processes in which the material moving downslope remains fairly coherent and moves along a well-defined surface.

Parallel layers of sedimentary rock.

Wind-generated waves that have moved into an area of weaker winds or calm.

Turbidity current deposit characterized by graded bedding.

The central, completely dark part of a shadow produced during an eclipse.

A surface that represents a break in the rock record, caused by erosion or nondeposition.

A bench or shelf in the bedrock at sea level, cut by wave erosion.