Glaciers

** Welcome to the "Glaciers" wiki, created by Marissa Landolt and Kristin Blundell! We hope you find it interesting and easy to use. If you have any questions, don't hesitate to ask, and it would be great if you left a comment on our discussion! :D ** ** Found some of the words difficult to identify? Click here to go to our **** glossary. **

__**Table of contents**__ **-A Prezi on __"the basics of glaciers"__ **  **-A video on __"glacier land features"__ **   **-A video on __"how do glaciers affect weather and climate?"__ **   **-A video on __"icebergs"__ **   **-An easy-to-read illustrated write up on __"changes in glaciers over time"__ **   **-A pre-test review __"so what have you learned?"__ **   **-A quiz __"test your knowledge on glaciers"__ **   **- __References__ **

** __The basics of glaciers__ ** **This prezi will define the following:** **-What are glaciers?**  ** -Where do glaciers occur? **  ** -What happens when/how do glaciers move? **  ** -How are glaciers useful? **  ** -What are some of the world's largest glaciers? **  ** -How have glaciers changed over time? ** media type="custom" key="9598476" align="center"

**__Glacier land features__** ** This video **** describes how glaciers made the following features: **  **-Cirques** leading to an **arête** then to a **horn**   **-U-shaped valleys, hanging valleys,** which lead to a **waterfall**   **-Fiords**   **-Eskers**   **-Striations**   **-Erratics**   **Go to 3:18 to skip the video.** media type="youtube" key="o3F4EmDA-yQ" width="425" height="350" align="center"

**__How do glaciers affect weather and climate?__** ** This video will describe to you how glaciers affect weather and climate. ** media type="youtube" key="RgaM7AHZ4Kk" width="425" height="350"

__**Icebe**____**rgs**__ ** This video will show you what icebergs are and how they are dangerous. ** media type="youtube" key="bqoTz_U_iB4" height="349" width="425" align="center"

** __Changes in glaciers over time__ ** **We've decided to change it up and write here instead of making a video/Prezi. We hope you still like it anyways, we tried to make it easy for reading. This is about how glaciers have changed over the years, in size and location.** The large glaciers today are small compared to the glaciers of the last big ice age. Starting around 2 million years back, ice sheets scattered over most of Eurasia, the continent covering around 10.6% of the Earth's surface, and North America. When ice began to melt at the end of the last ice age, sea levels rose and glaciers vanished as they melted.

Land that had been weighed down by glaciers rebounded.

Greenland and Antarctic ice sheets are included in the last ice age's remains. So the glaciers have ultimately decreased greatly in size, and are slowly fading from places like North America and Eurasia.

**__Interesting glacier facts__** ** This Prezi has some interesting/random glacier facts for you! ** media type="custom" key="9585492" align="left" width="110" height="110"

** __So what have you learned?__ **  **So what have you learned from our glaciers wiki? Well, here is a pre-test review. If you've read about all these topics and are familiar with the answers to these questions, then you'll be set for the test. If you haven't... well, go look at them. Of course, not all of these questions will be on the quiz, but they are all useful to know.**

__ The basics of glaciers: __  ﻿ ﻿*What are glaciers? *Where do glaciers occur? *What happens when/how do glaciers move? *How are glaciers useful? *What are some of the world's largest glaciers? *How have glaciers changed over time? __ ﻿Glacier land features: __  ﻿*What are cirques? *How are aretes formed? *How are horns created? *How is a U-shaped valley and a hanging valley made? *How is a fiord produced? *How are eskers created? *How are striations made? *What is an erratic? *How does cirques leade to an arete, then to a horn? __ ﻿How do glaciers affect weather and climate: __ __ ﻿ __ ﻿*What are polar easterlies? *What happens when cold air flows off of a continental glacier? *What is the polar ice cap, and why isn't it a glacier? *What temperature will an area with glaciers be, and why? *Why are areas with no glaciers warmer? *What happens when the atmosphere warms enough to begin melting glaciers?

__Icebergs:__ *What are icebergs? *How are icebergs dangerous?

__ Changes in glaciers over time: __ *What size are the glaciers today compared to the glaciers of the last major ice age *What happened at the end of the last ice age? *What happened to land that had been weighed down by glaciers? *How have glaciers ultimately changed in location?

**__Test your knowledge on Glaciers__** **Are you a glacier expert now? Well why don't you find out? Take this review quiz, it's not too hard.** media type="custom" key="9610292"

** __References__ ** LeDrew, B. (2006). //B.C. Science probe 8//. Toronto: Nelson. General Info. (n.d.). //National Snow and Ice Data Center (NSIDC)//. Retrieved May 30, 2011, from http://nsidc.org/glaciers/information.html Glaciers and icecaps, USGS Water Science for Schools water-information site. (n.d.). //USGS Georgia Water Science Center - Home Page//. Retrieved May 30, 2011, from http://ga.water.usgs.gov/edu/earthglacier.html Glaciers and Icefields. (n.d.). //US Forest Service - Caring for the Land and Serving People.//Retrieved May 31, 2011, from http://www.fs.fed.us/r10/tongass/forest_facts/resources/geology/icefields.htm __ **G o C a n u c k s ! ** __