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GLACIERS

GLACIERS. WHAT DO YOU ALREADY KNOW ABOUT THEM ? ANSWER TRUE OR FALSE. GLACIERS. WHAT DO YOU ALREADY KNOW ABOUT THEM ? ANSWER TRUE OR FALSE. Glaciers are made of ice. GLACIERS. WHAT DO YOU ALREADY KNOW ABOUT THEM ? ANSWER TRUE OR FALSE. Glaciers are made of ice.

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GLACIERS

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  1. GLACIERS WHAT DO YOU ALREADY KNOW ABOUT THEM? ANSWER TRUE OR FALSE.

  2. GLACIERS WHAT DO YOU ALREADY KNOW ABOUT THEM? ANSWER TRUE OR FALSE. Glaciers are made of ice.

  3. GLACIERS WHAT DO YOU ALREADY KNOW ABOUT THEM? ANSWER TRUE OR FALSE. Glaciers are made of ice. Glaciers can only be formed during the ice ages.

  4. GLACIERS WHAT DO YOU ALREADY KNOW ABOUT THEM? ANSWER TRUE OR FALSE. Glaciers are made of ice. Glaciers can only be formed during the ice ages. Due to global warming, all glaciers have melted.

  5. GLACIERS WHAT DO YOU ALREADY KNOW ABOUT THEM? ANSWER TRUE OR FALSE. Glaciers are made of ice. Glaciers can only be formed during the ice ages. Due to global warming, all glaciers have melted. Glaciers are capable of moving.

  6. GLACIERS

  7. A large mass of ice that moves slowly over land.

  8. VALLEY GLACIER 2 KINDS OF GLACIERS

  9. VALLEY GLACIER CONTINENTIAL GLACIER 2 KINDS OF GLACIERS

  10. VALLEY GLACIER Long & Narrow 2 KINDS OF GLACIERS

  11. TWIN GLACIER IN ALASKA

  12. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys 2 KINDS OF GLACIERS

  13. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys 2 KINDS OF GLACIERS

  14. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys Found on high mountains CONTINENTIAL GLACIER 2 KINDS OF GLACIERS

  15. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys Found on high mountains CONTINENTIAL GLACIER Covers much of continent or large island. 2 KINDS OF GLACIERS

  16. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys Found on high mountains CONTINENTIAL GLACIER Covers much of continent or large island. Larger than valley glacier 2 KINDS OF GLACIERS

  17. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys Found on high mountains CONTINENTIAL GLACIER Covers much of continent or large island. Larger than valley glacier Spread out over large areas 2 KINDS OF GLACIERS

  18. GLACIER IN ICELAND

  19. VALLEY GLACIER Long & Narrow Form when snow & ice build up in high mountain valleys Move down valleys Found on high mountains CONTINENTIAL GLACIER Covers much of continent or large island. Larger than valley glacier Spread out over large areas Cover 10% of Earth’s surface 2 KINDS OF GLACIERS

  20. GLACIERS IN THE UNITED STATES

  21. Ice Sheet on  Ellesmere Island, Canada Photo credit: Geological Survey of Canada  

  22. How do glaciers form?

  23. How do glaciers form? • Form when more snow falls than melts

  24. How do glaciers form? • Form when more snow falls than melts • Snow builds up year after year

  25. How do glaciers form? • Form when more snow falls than melts • Snow builds up year after year • Pressure compacts the snow to ice at the bottom

  26. How do glaciers form? • Form when more snow falls than melts • Snow builds up year after year • Pressure compacts the snow to ice at the bottom • At 30-40 meters high gravity begins to pull it down hill

  27. VALLEY GLACIERS CONTINENTAL GLACIERS GLACIERS MOVE!

  28. VALLEY GLACIERS A few centimeters to a few meters per day CONTINENTAL GLACIERS GLACIERS MOVE!

  29. VALLEY GLACIERS A few centimeters to a few meters per day Can suddenly slip quickly-- called a surge CONTINENTAL GLACIERS GLACIERS MOVE!

  30. VALLEY GLACIERS A few centimeters to a few meters per day Can suddenly slip quickly-- called a surge Suring glaciers can move 6 km/ year CONTINENTAL GLACIERS GLACIERS MOVE!

  31. VALLEY GLACIERS A few centimeters to a few meters per day Can suddenly slip quickly-- called a surge Suring glaciers can move 6 km/ year CONTINENTAL GLACIERS Can flow in all directions Spread out like pancake batter in a frying pan GLACIERS MOVE!

  32. VALLEY GLACIERS A few centimeters to a few meters per day Can suddenly slip quickly-- called a surge Suring glaciers can move 6 km/ year CONTINENTAL GLACIERS GLACIERS MOVE!

  33. The front of the surging glacier.

  34. The fractured and surging Bering Glacier in Alaska, Oct. 1993, Chugach

  35. By PLUCKING As the glacier forms rocks stick to the bottom. As the glacier moves it carries the rocks along with it. Scratching can occur along the way. GLACIAL EROSIONGlaciers can erode the land Bedrock

  36. PLUCKING

  37. HOW DOES PLUCKING HAPPEN?

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