Lab 7: Glaciers, Erosion, and Deposition

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Presentation transcript:

Lab 7: Glaciers, Erosion, and Deposition Key Q: How can glaciers create & change landforms?

Glaciers

What is a Glacier? Glaciers are made up of fallen snow that, over many years, compresses into large, thickened ice masses. Due to the ice’s mass and the force of gravity glaciers flow like very slow rivers.

How do Glaciers affect the land? Glaciers transport material as they move. They sculpt and carve away the land beneath them. The ice erodes the land surface and carries the broken rocks and sediment far from their original places.

rock and sediment a glacier picks up or pushes as it moves Moraines rock and sediment a glacier picks up or pushes as it moves (like a plow)

Terminus the front of the glacier

If the front of the glacier moves forward faster then it melts. Glaciers advance if there is more ice accumulating then melting Glaciers can advance

Glaciers can retreat If the front of the glacier moves slower than it melts Glaciers retreat if there is more ice melting than accumulating

Glaciers can “standstill” If the glacier stays in the same place Amount of ice accumulating and melting are equal Glaciers can “standstill”

transformed into glacier ice? How is fluffy snow transformed into glacier ice?

good name for a valley glacier? 2. Why is “river of ice” a good name for a valley glacier?

3. Explain how glaciers form both erosional & depositional landforms.

4. In which part of the Earth System would you put glaciers? Why?

5. How do glaciers affect the geosphere?

Explain how changes in the atmosphere can affect glaciers.

7. What is a moraine?

8. What is a terminus?

9. Explain how glaciers can advance, retreat or standstill.

10. What force causes glaciers to flow?

11. Make Earth System Connections