| Earthquake |
a trembling or shaking of the ground produced by the passage of seismic waves |
| Earthquake Focus |
point within the Earth at which the energy of an earthquake is first released by rupture and from which seismic waves originate |
| Ecology |
science of interactions between life forms and their environment |
| Ecosystem |
group of organisms and the environment with which the organisms interact |
| Equator |
parallel of latitude occupying a position midway between the Earth’s poles, designated as latitude 0° |
| Equinox |
instant in time when the subsolar point falls on the Earth’s equator and the circle of illumination passes through both poles |
| Erosion |
the group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth's surface |
| Evaporation |
process in which water in the liquid or solid state passes into the vapor state |
| Exotic River |
stream that flows across a desert but is derived from outside the desert |
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E |
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intended for Grade School-aged and Middle School-aged kids.