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Relative location
Describes a place in relation to other places around it.
Glossary
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Relief
The difference in elevation of a landform from the lowest point to the highest point.
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Religion
The belief in a supernatural power or powers that are regarded as the creators and maintainers of the universe and the system of beliefs itself.
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Religions
Religions are an ordered listing of religions in a country by adherents starting with the largest group and sometimes including the total population.
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Remote sensing
Remote sensing is the science of acquiring and analyzing data without being in contact with the subject.
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Renaissance
A time of renewed interest in learning and the arts that lasted from the 14th through 16th centuries. It began in the Italian city-states and spread north to all of Europe.
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Renewable resource
A resource, such as timber that is grown or renewed so that a continual supply is available.
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Representative democracy
A government in which the people rule through elected representatives.
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Republic
A government in which citizens elect representatives to rule on their behalf.
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Reserve
Public land was set aside for native peoples by the government.
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Reserves
Reserves: the amount of a resource, such as copper, known to exist, and not yet used.
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Resources
Resources become valuable through human appraisal, and their utilization reflects levels of technology, location, and economic ambition.
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Respiratory disease
Respiratory disease (Meningococcal meningitis) may be acquired through close contact with an infectious person.
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Revolution
Revolution: the overthrow of a government.
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Richter scale
A way to measure information collected by seismographs to determine the relative strength of an earthquake.
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Rift valley
A long, thin valley created by the moving apart of the continental plates, present in east Africa, stretching over 4,000 miles (6,437 km) from Jordan in southwest Asia to Mozambique in southern Africa.
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Rift Valley fever
Rift Valley fever is a viral disease affecting domesticated animals and humans. Rift Valley fever transmission may happen by a mosquito and other biting insects.
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Right of return, Palestinian
The Palestinian Arab principle that refugees displaced from Israel and the Occupied Territories in the 1948 and 1967 wars be allowed to return to the region.
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Ring of fire
The chain of volcanoes that lines the pacific rim. Located in the Pacific Ocean zone, where there are many volcanoes and frequent earthquakes.
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Riparian
A state containing or bordering a river.