Stories of Our Earth: Ice Ages and Their Impact on Geography Just a couple of weeks ago, we were complaining about how winter was so cold and how no would have ever ended up in Canada; but imagine living in the glacial period, where there was a time when glaciers, large masses of ice, covered a huge portion of the Earth's surface. Studies show that polar ice caps, as we know them today, covered about 30% of the Earth during our last ice age. The Earth remained in this state for thousands and thousands of years. Cold, right? According to geologists, there have been an approximate total of 5 major ice ages. They began to appear about 2,300,000 years ago, until the most recent, about 10,000 years ago; it was the time of the ice age/glacial period, and that's exactly what happened. Ice ages are moments in time when temperatures throughout the world, including the Earth's atmosphere and surface, were consistently cold for a span of more than thousands of years. Unlike the average temperature of 220°C we have today, ice ages were much colder, averaging around 50°C. While geographers don't all agree on a theory as to why the ice ages may have occurred, there are a couple of theories that many believe may have caused the ice ages to begin. One of the main theories about the cause of the Ice Age involves the idea of ​​another theory, the theory of plate tectonics, which proposes that the Earth's surface, divided into plates, is in constant motion. The theory suggests that the Earth's plates moved away from the equator where it is generally warm, and towards a colder place, an area where the sun's rays were not very strong, which made the earth very cold. This is a logical theory... middle of paper......rumlins http://allyouneedtoknowaboutglaciers.weebly.com/stratified-drift.html http://www.bbc.co.uk/schools /gcsebitesize/ geography/glacial_landscapes/glaciation_rev2.shtml http://www.museum.state.il.us/exhibits/ice_ages/why_4_cool_periods.html http://www.bibliotecapleyades.net/ciencia/ciencia_iceage.htm http://geography.howstuffworks .com/terms-and-associations/ice-age2.htm http://geography.howstuffworks.com/terms-and-associations/ice-age.htm http://www.sentex.net/~tcc /iceage. html https://www.google.com/search?q=glaciation+definition&oq=glaciation+definition&aqs=chrome..69i57.4046j0j1&sourceid=chrome&espv=210&es_sm=122&ie=UTF-8#q=glaciers+definition http: //www .isgs.uiuc.edu/?q=outreach/geology-resources/end-moraines-end-glacial-ridehttp://www.isgs.uiuc.edu/?q=outreach/geology-resources/end- morenes-end -glacial-ride http://dictionary.reference.com/browse/glacial+drift