Brainstorm with a shoulder partner on the definition of a landform? Landforms on Earth Brainstorm with a shoulder partner on the definition of a landform?

Landforms In this lesson, we will specifically study sand dunes, canyons, and river deltas

Canyon Grand Canyon and the Colorado River

Sand Dunes Death Valley, California

River Delta Mississippi River Delta - shows its characteristic bird's-foot pattern and plumes of sediment entering the ocean from the multiple mouths of the Mississippi River.

Erosional / Weathering Agents What is a erosional agent? Any naturally occurring phenomena that moves earth materials What is a weathering agent? Anything that causes the breakdown of rock. Inform students that in this lesson the focus will be on wind, water, waves, and ice as agents of erosion and weathering.

Erosional / Weathering Agent: Wind Upper photo: dunes near Monahans, Texas Lower photo: sand blowing on beach

Erosional / Weathering Agent: Wind Upper photo: Arches National Park, Utah Lower photo: Big Bend, Texas

Erosional / Weathering Agent: Running Water Upper photo: Icicle Creek, Washington Lower photo: Niagra River, New York

Erosional / Weathering Agent: Running Water Upper photo: Gully formed after a heavy rainfall Lower photo: Kolob Canyon, Utah

Erosional / Weathering Agent: Running Water Upper photo: Atchafalaya River Delta, Louisiana Lower photo: Wax Lake Delta, Louisiana

Erosional / Weathering Agent: Waves Upper photo: Cliff carved by wave action Lower photo: Florida

Erosional / Weathering Agent: Waves Upper photo: Bat’s Hole cliff erosion Lower photo: Swanlake Bay wave cut platform

Erosional / Weathering Agent: Ice Upper photo: glacier edge Lower photo: Mt. Hood, Oregon

Erosional / Weathering Agent: Ice Upper photo: Glacier Point Apron, Montana Lower photo: Margerie Glacier, Alaska

Landforms on Earth Are all Earth’s landforms the same? Why or why not? What are some of the features that you see when you look at the pictures? Do you think that these landforms have always been the same? Do you think that changes in these landforms occurred quickly or did they take a long time to be formed? Are all Earth’s landforms the same? Why or why not? No, Earth has different landforms. Answers may vary on the why responses. What are some of the features that you see when you look at the pictures? Answers may vary Do you think that these landforms have always been the same? No Do you think that changes on these landforms occurred quickly or did they take a long time to be formed? It took time for these landforms to occur. How will these landforms look two days from now? One year from now? Ten years from now? One Hundred years from now? One thousand years from now? Most of the time, the landforms take many years to Was there a force/action that caused these landforms to change? Is force a form of energy? Do you think that the force (energy) of water and wind may have created some of these landforms? How could we measure these changes?

Landforms on Earth How will these landforms look: two days from now, one year from now? ten years from now? one hundred years from now? one thousand years from now? one million years from now? What force caused these landforms to change? Do you think that water, wind, or ice may have created some of these landforms? Which landform was created by which erosional / weathering agent? How will these landforms look two days from now? One year from now, ten years from now? Very little noticeable change. One Hundred years from now? Change can begin to be noticeable. One thousand years from now? Most will change in size and shape over many years. One million years from now? There may be large amount of change. What force/action caused these landforms to change? Energy from wind, water, and ice caused the changes. Do you think that water, wind or ice may have created some of these landforms? Yes, canyons and deltas are caused by water, and sand dunes by blowing wind. Ice, in the form of glaciers, can carve rocks or cause them to crack.

Landform Defined In your science notebook, write a definition for the word “landform.” Landform - Any feature on the Earth's surface, caused by erosion, sedimentation, or movement of material by wind, water, or ice Teacher note. Do not click after the first sentence comes in. Allow time for students to write a definition before giving them a formal definition.