Geological and Seismic Terms

Front

Boundary

Back

A line that marks the limits of an area; a dividing line.

Front

Convection

Back

The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity.

Front

Convergent plate boundary

Back

A tectonic boundary where two plates are moving toward each other.

Front

Density

Back

The degree of compactness of a substance.

Front

Disaster

Back

A sudden event, such as an accident or a natural catastrophe, that causes great damage or loss of life.

Front

Divergent plate boundary

Back

A tectonic boundary where two plates are moving away from each other.

Front

Earthquake

Back

A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

Front

Energy

Back

The strength and vitality required for sustained physical or mental activity.

Front

Eruption

Back

An act or instance of erupting, such as a volcanic eruption.

Front

Fatalities

Back

Deaths resulting from a disaster or accident.