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Exam Study guide
6th period
| Term | Definition |
|---|---|
| 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
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