Give each group a tile from the World Physical MapMaker Kit tabletop map and markers for each color in the key created in Step 1. Locate underwater geologic features on the maps tiles.ĭivide the class into eight small groups. A rise is also known as a mid-ocean ridge.Ī plateau is a large region that is higher than the surrounding area and relatively flat.Ģ. Define on a whiteboard the terms below, creating a key using a different color to represent each term.Ī trench is a long, deep depression in the ocean floor.Ī troughis a gently sloping depression in the ocean floor.Īn island is a body of land surrounded by water.Ī ridge is long, narrow elevation of earth.Ī gap is a steep-sided opening through a mountain ridge.Ī rise is an underwater mountain range located where tectonic plates are spreading apart. ![]() ![]() Explain that geologists and oceanographers often use different terms for ocean floor formations and terrestrial formations. Ask: What types of landforms are there on the ocean floor? Students may suggest there are mountains, valleys, or flat areas. Have students imagine what the ocean floor might be like. ![]() Brainstorm and define underwater landforms.Įxplain to students that they will be exploring Earth's ocean floor and the types of geologic activity that occur there.
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