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Mountains – large elevations of the earth’s surface rising abruptly from the surrounding level. Rainforests – dense forests rich in biodiversity, found in tropical areas with consistent heavy rainfall. Oceans & Seas – Large bodies of salt water. Glaciers – slow moving masses of ice formed by the buildup and compaction of snow. Volcanoes – mountains or hills having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth’s crust. Grasslands – a large open area of country covered with grass. Islands – pieces of land surrounded by water. Lakes – large bodies of freshwater surrounded by land. Rivers & River Systems – large natural streams of water flowing in a channel into another water source. Deserts – an arid region with little to no rainfall. Region – an area with at least one characteristic or feature that sets it apart from other areas. Hemisphere – a region created when the Earth is divided in half. Continent – a large unbroken land mass surrounded by water.