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SCI-7 U7

Cumulative Vocab Test Words

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.
Created by: susanmason



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