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Exam Study guide

6th period

natural resources products of earth that people use to meet their needs
renewable resources cannot be used up; can be replaced
nonrenewable resources cannot be replaced; limited supply
acid rain rain containing high amounts of chemical pollutants.
deforestation cutting down trees without replanting
conservation careful use of resources
ecosystems places where plants and animals are dependent upon one another and their surroundings to live.
death rate number of people out of every 1,000 who die in a year.
birth date number of children born every year for every 1,000 people
famine lack of food.
population density average number of people living in a square mile or kilometer
urbanization movement to cities
emigrate move to another country
refugee person who flees to another country to escape persecution or disaster.
developed country country in which a great deal of manufacturing is carried out.
developing country country that is working toward industrialization
atmosphere the blanket of gases, or air surrounding the earth.
lithosphere the earth's hard outer shell, or land.
hydrosphere all the water on earth.
biosphere all living things and the environments in which they live.
Created by: yohali