Unit 2 Lesson 4 Landforms and Florida Copyright

Unit 2 Lesson 4 Landforms and Florida Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida Benchmark • SC. 6. E. 6. 2 Recognize that there a variety of different landforms on Earth’s surface such as coastlines, dunes, rivers, mountains, glaciers, deltas, and lakes and relate these landforms as they apply to Florida. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida Build, Break, and Move What is a mountain? • A mountain is a region of increased elevation on Earth’s surface that rises to a peak. • Mountains form through the collision of tectonic plates and from volcanic eruptions. • Mountains have elevations of at least 300 meters. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a mountain? • Florida does not have any mountains. • Mountains are important sources of sediment, which is pieces of rock that have been broken down from existing rock over time. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a mountain? • How do you think scientists determined the origin of some of the sediments in Florida? Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a glacier? • A glacier is a mass of gradually moving or flowing ice. • An ice sheet is a very large glacier that covers a large area. • About 18, 000 years ago, a large ice sheet in North America caused changes in sea level and created sediments. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida Let’s Hit the Water! What is a lake? • A lake is a body of fresh or salt water that is surrounded by land. • Lakes can be a part of a larger water system called a watershed. • Sinkhole lakes can form when underground caverns collapse and later fill in with water. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a river? • Rivers transport sediment. • A river is a large natural stream of water that flows into an ocean or other large body of water, such as a lake. • Rivers change course over time as they break down river banks and deposit sediment. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a river? • Name at least three lakes or rivers in Florida. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a delta? • A delta is a deposit, formed by sediment, that accumulates at the mouth of a river. • Deltas form as rivers slow down when they reach other bodies of water. Sediments that were carried in the water are deposited. • Most Florida rivers do not form large or significant deltas. The Apalachicola River in the Florida panhandle is an exception. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida Surf’s Up What is a coastline? • Coastlines are constantly changing, or dynamic. • A coastline is a dynamic boundary between land the ocean. • Waves, wind, sediment supply, tides, and the geology of the region can affect the characteristics of coastlines. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a dune? • A dune is a mound of wind-deposited sand. • Dunes are found in desert and coastal regions. • The shape of a beach, the sand supply, the wind direction, and the type of sand can determine the types of dunes formed along coastlines. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 2 Lesson 4 Landforms and Florida What is a dune? • Dunes offer protection for many species of plants and animals. • Human activities and natural processes can cause dunes to disappear. • Conservation efforts are often used to protect dunes from disappearing. Copyright © Houghton Mifflin Harcourt Publishing Company