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SCI-7 U7
Cumulative Vocab Test Words
Term | Definition |
---|---|
natural resources | Materials removed from the Earth and used by people. |
renewable resources | Natural resources that can be replaced by nature. |
non-renewable resources | Natural resources that cannot be replaced by nature. |
irrigation | The process of supplying water to dry regions. |
erosion | The carrying off of soil by water or wind. |
pollution | The introduction of contaminating substances or energy into the natural environment that changes the environment for the worse. |
fossil fuels | Fuels (coal, oil, or natural gas) formed hundreds of millions of years ago from the remains of dead plants and animals. |
hydrocarbons | Compounds made of hydrogen and carbon that are harmful to plants and can break down the ozone layer. |
acid rain | Precipitation that is more acidic than normal (pH less than 7). |
greenhouse gases | Gases in the atmosphere trap heat and make the Earth a place that is warm enough to live, however too much of these gases in the atmosphere can cause global warming. |