Ice Ages

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Ice Ages By: Nick, Scott, & Sam

description

Ice Ages. By: Nick, Scott, & Sam. Legend–wait for it– dary video. Ice Age The Movie. Louis Agassiz. Swiss naturalist Theory ( p . 421) Not much support for his ideas in Europe Agassiz in America ( p . 423). Glacier Theory of 1800 (3 levels). - PowerPoint PPT Presentation

Transcript of Ice Ages

Page 1: Ice Ages

Ice AgesBy: Nick, Scott, & Sam

Page 2: Ice Ages

Legend–wait for it–dary video

Ice Age The Movie

Page 3: Ice Ages

Louis Agassiz

•Swiss naturalist

•Theory (p. 421)

•Not much support for his ideas in Europe

•Agassiz in America (p. 423)

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Glacier Theory of 1800 (3 levels)• 1. Alpine glaciers - Modern glaciers in the Swiss

Alps and Norway had once extended farther down their valleys than today

• 2. Mountain ice caps - Glacier cover in the Swiss Alps and Norway had once been much thicker and had ice caps

• 3. Continental Ice Sheets - Vast sheet of ice spread from the Arctic and covered all of Europe as far south as the Mediterranean

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Milutin Milankovitch

•Suggested that Ice Ages have to do with the movement on the Earth (p. 424-425)

•Köppen continued on Milankovitch’s ideas (p. 426)

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Glacial Map

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Glaciers• Largest moving objects

on Earth

• Massive rivers of ice that form in areas where more snow falls each winter than melts each summer

• Glaciers and their Effects

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Global Warming Theory #1• Global sea level has

already risen by 4 to 8 inches in the past century

• Arctic summers could be ice-free by 2040, and sea levels could rise as much as 23 inches by 2100 if current warming patterns continue

• Global Warming - Glacier Melt

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Global Warming Theory #2

•Global warming may actually cause an ice age

•Theory (p. 431)

Could This

Cause This?

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Bibliography

•http://academic.emporia.edu/aberjame/histgeol/agassiz/glacial.htm

•http://science.howstuffworks.com/environmental/earth/geophysics/glacier.htm

•http://www.nrdc.org/globalwarming/fcons/fcons4.asp