Seasons and Weather
Either of two times of year when the sun's rays shine directly overhead at noon at the furthest points north or south, and that mark the beginning of summer and winter.
Solstice
The transfer of heat in the atmosphere by upward motion of the air.
Convection
The total of knowledge, attitudes, and behaviors shared by and passed on by members of a group.
Culture
The number of live births per total population, often expressed per thousand population.
Birthrate
An independent unit that occupies a specific territory and has full control of its internal and external affairs.
State
The condition of the atmosphere at a particular location and time.
Weather
The warming of the waters off the west coast of South America.
El Nino
A group that shares a geographic region, a common language, and a sense of identity and culture.
Society
The number of deaths per thousand people.
Mortality Rate
A group of people with a common culture living in a territory and having a strong sense of unity.
Nation
Falling water droplets in the form of rain, sleet, snow, or hail.
Precipitation
The layer of gases released by the burning of coal and petroleum that traps solar energy, causing global temperature to increase.
Greenhouse Effect
Taking existing elements of society and creating something new to meet a need.
Innovation
A factor that draws or attracts people to another location.
Push-Pull Factor
A type of government in which a ruling family headed by a king or queen holds political power and may or may not share the power with citizen bodies.
Monarchy
The typical weather conditions at a particular location as observed over time.
Climate
An interdependent community of plants and animals.
Ecosystem
The spread of ideas, inventions, or patterns of behavior to different societies.
Diffusion
The rate at which population is growing, found by subtracting the mortality rate from the birthrate.
Rate of Natural Increase
A type of government in which an individual or a group holds complete political power.
Dictatorship
A tropical storm, like a hurricane, that occurs in the western Pacific Ocean.
Typhoon
A regional ecosystem.
Biome
A version of a language that reflects changes in speech patterns due to class, region, or cultural changes.
Dialect
The number of organisms a piece of land can support without negative effects.
Carrying Capacity
A system in which the government holds nearly all political power and the means of production.
Communism