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Movie: How the Earth Was Made – Great Lakes – 20 point assignment

Pre-Movie Questions: ½ point each. Short answer responses are acceptable.

  1. How were the Great Lakes formed? Briefly describe what you know.
  1. How long did it take for the Great Lakes to form?

Post-Movie Questions: ½ point each. Short answer responses are acceptable.

  1. What lies deep below Lake Michigan and Lake Huron?
  1. Where did these rock formations originally come from?
  1. Layers above the salt is formed from decaying coral reefs, what is this rock called?
  1. What type of rock was formed when the seawater dried up and left the salt behind?
  1. What is the difference between these two types of rock?
  1. Connecting to our hydrogeology unit – Why is the basin of rock directly under Lake Michigan, Lake Erie and Lake Huron more resistant to erosion from the lake?
  1. What type of rock lies below the cap rock of the Niagara Falls?
  1. How far dothe Niagara Falls recede each year?
  1. What do scientists believe is the driving force that created the Great Lakes?
  1. As time goes on, scientists modify the model for the creation of the Great Lakes because the area that the Great Lakes cover is so large. How does the model change?
  1. Are all of the great lakes thought to have formed in the same way?
  1. What do scientists discover about the bottom of lakes Superior and Ontario that suggest these lakes formed in a different way?
  1. How were these lakes formed?
  1. According to the movie, fears have grown about the Great Lakes future. Water levels have fallen over time. Besides blaming global warming, what else do scientists believe is happening to the rock under the lakes?
  1. What is happening to the CN Tower in Toronto that supports this theory?
  1. Lake Nipissing in Canada was at sea level when it was first formed. What has happened to it over the last several thousand years?
  1. 6 points: Thinking about your answer to question #1, how has your understanding of the formation of the Great Lakes changed? Be specific and answer in complete sentences. Your answer should reflect a deeper understand of how the lakes were formed, not just that they were formed from glaciers.
  1. 6 points: Connect what you have seen in this movie to something we have studied this year. How does the formation of the Great Lakes connect to: the Earth’s 4 spheres, the rock cycle, or plate tectonics.
    Choose one of the topics to connect to and write your answers in complete sentences.