average, year-after-year conditions of temperature and precipitation in a particular region

cold climate zone where the sun\'s rays strike Earth at a very low angle

natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases

physical, or nonliving, factor that shapes an ecosystem

symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed

climate within a small area that differs significantly from the climate of the surrounding area

permanently dark layer of the oceans below the photic zone

organisms that live attached to or near the ocean floor

wetlands formed where rivers meet the ocean

tiny, free-floating organisms that occur in aquatic environments

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