A Global Context
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When water is too warm coral will eject the algae in their tissues making them turn white. It is a sign of stress and an indicator of poor health and even the death of the coral.

A large sea wave resulting from a tectonic shift.

A layer of soil that remains frozen all the year round.

The process by which improvements in transport make it quicker to cover the same distance and thus bring places closer together.

The period around 1800, centered in Britain, in which manufacturers rapidly discovered and implemented new ways of creating products.

The growing interdependence across national boundaries of economic flows and transactions.

A model of different stages that begins with high birth and death rates, moves through increasing birth rated and declining death rates to low birth rates and long life expectancy.

The 750-mile active zone between he Pacific and North American plates that runs from San Francisco down to southern California.

A logarithmic scale that measure seismic disturbances from 1 to 10.

A global change in mortality and fertility that occurred around 1800, but also refers to the four phases of transition.

An indicator used to describe and measure the number of distinct plant and animal species in a given geographical area.

Occurs when birth rates fall to a point that requires less investment in the very young, but before more investment is required on the elderly, and results in the relative and absolute increase of younger, more productive workers.

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