The topographic ridge that separates drainage basins.

Wet Adiabatic Lapse Rate

The rate of decline in the temperature of a rising parcel of air after it has reached saturation. This rate is less than the dry adiabatic lapse rate (9.8° Celsius per 1000 meters) because of the heat energy added to


Dominant winds of the mid-latitudes. These winds move from the subtropical highs to the subpolar lows from west to east.

Weathering Landform

Is a landform created by the physical or chemical decomposition of rock through weathering. Weathering produces landforms where rocks and sediments are decomposed and disintegrated. This includes landforms with some of the following geomorphic features: karst, patterned ground, and soil


Physical, chemical or biological breakdown of rocks and minerals into smaller sized particles.

Weather Map

Map that displays the condition of the physical state of the atmosphere and its circulation at a specific time over a region of the Earth.


The state of the atmosphere at a specific time and place.


Distance between two successive wave crests or troughs.

Wave-Cut Platform

A flat or slightly sloping bedrock surface that forms in the tidal zone. Caused by wave erosion.

Wave-Cut Notch

A rock recess at the foot of a sea cliff where the energy of water waves is concentrated.


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