The transmission of cultural ideas and practices around the world.
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 term denoting the arrival of Europeans to the Americas, which resulting in vast demographic changes to indigenous populations.
The economic and political alliance of most European countries.
A gas produced from the burning of carbon. The increasing amount in the atmosphere is responsible for climate change.
The zone between protected wild land and land being developed.
An indicator used to describe and measure the number of distinct plant and animal species in a given geographical area.
A large sea wave resulting from a tectonic shift.
A global change in mortality and fertility that occurred around 1800, but also refers to the four phases of transition.
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.
Generally refers to any sustained period of cooler weather, but more specifically often used to the period from 2.5 million to 10,000 years ago when permanent ice sheets were created and the weather cooled dramatically.
A measure of the number of individuals below 14 and over 65 when compared to the total working aged population.
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