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Vocabulary Words Copy on specified page of your SS Notebook. Tributary – Any smaller stream or river that flows into a larger stream or river. Aquifers – Underground, water-bearing layers of rock, sand, or gravel.
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Vocabulary WordsCopy on specified page of your SS Notebook Tributary – Any smaller stream or river that flows into a larger stream or river. Aquifers – Underground, water-bearing layers of rock, sand, or gravel. Acid rain – A type of polluted rain, produced when pollution from smokestacks combines with water vapor. Ozone layer – A form of oxygen in the atmosphere that helps protect Earth from harmful solar radiation. Global warming – A slow increase in Earth’s average temperature. Greenhouse effect – Process by which Earth’s atmosphere traps heat.