Age dating of rocks

Zone of low atmospheric pressure and ascending air located at or near the equator. This law suggests that the amount of radiation passing through a specific area is inversely proportional to the square of the distance of that area from the energy source.

Rising air currents are due to global wind convergence and convection from thermal heating. A mass of igneous rock that forms when magma from the mantle migrates upward and cools and crystallizes near, but not at, the Earth's surface. Mathematically, the Inverse Square Law is described by the equation: The emission of alpha or beta particles or gamma rays from radioisotopes.

A dome-shaped glacier covering an area greater than 50,000 square kilometers.

Greenland and Antarctica are considered ice sheets.

Is the capture of precipitation by the plant canopy and its subsequent return to the atmosphere through evaporation or sublimation.

The amount of precipitation intercepted by plants varies with leaf type, canopy architecture, wind speed, available radiation, temperature, and the humidity of the atmosphere.

Index contours occur every four or fifth contour interval and help the map user read elevations on a map.

Inference of a generalized conclusion from particular instances.

Contour line that is accentuated in thickness and is often labeled with the appropriate measure of elevation.

Form in cracks that develop in the soil during winter because of thermal contraction.

In the spring, these cracks fill with liquid water from melting snow which subsequently re-freezes.

In this lower layer of cold air, the raindrops freeze into small ice pellets.

Like freezing rain, an air temperature inversion is required for development of ice pellets.

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Some of these species are beneficial, whereas others can take over and eliminate many native species.

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  1. This term is one that is commonly defined very specifically by state laws or regulations. States that have specifically provided links to definitions or information regarding this term through special CDS customizations content include: PA, KS, MN.