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ANSWER KEY Lesson Two: Moving Continents Vocabulary Station Part A: Describe what happens to the plates at each type of boundary and tell what geological activity is most likely to be found at each. Type of Boundary What Happens to the Plates? Geological Activity Found Here Divergent plates move apart volcanoes, earthquakes, underwater mountain chains Convergent plates come together or collide earthquakes, mountain formation Transform plates slide past each other earthquake activity Part B: Define each of the following terms: Ridge Trench Fault Sea Floor Spreading Subduction Zone Part C: What is the meaning of these terms: PANGAEA PANTHALASSA Lesson Two: Moving Continents Discussion Question Station Scientists have many different pieces of evidence to support their theory that the continents have moved from their original location. Describe each of the following pieces of evidence. Write 3 - 4 pieces of information about each. You may write in jot note form. A) The Jigsaw Puzzle Theory - B) Evidence in Magnetic Band of Rocks - C) Matching Fossils on Two Continents - D) Location of Mineral Deposits in Cold Climates - E) Mineral Bands on Two Continents - Lesson Two: Moving Continents Computer Station Go to the following website: http://volcano.und.nodak.edu/vwdocs/vwlessons/lessons/Pangea/Pangea1.html Fill in the following blanks with the information you learn at this site. The Earth’s crust is broken into twelve main pieces called . When two . The Earth’s plates move about plates come together, it is called a centimeters per year. 250 million years ago, the Earth’s continents were connected in one huge landmass called . Surrounding this landmass was a giant ocean called . Scientists believe that North America was in or near the during this time. They know this because they have located plants and animals in regions like of tropical and . About 150 years ago, Pangaea began to break up due to the in the mantle. Two new continents were formed: currents (present day continents (present North America (Greenland), Europe and Asia) and day continents Antarctica, Australia and South America). Scientists have searched for evidence to prove this theory of moving continents. By examining the and continents of content of rocks on the shores of the and , scientists have concluded that these two continents were once joined. Rocks at the area known as match identically for age and mineral content. The About 135 years ago, both Laurasia and Gondwanaland further split. During this movement of continents, the Indian plate crashed into the speed and force that it created the plate with such , the Earth’s tallest mountain range. Lesson Two: Moving Continents Hands-On Activity Station Read the following information about the moving plates. Then complete the activity and questions below. According to the Continental Drift Theory, the continents once formed a giant landmass named Pangaea. It wasn’t until the 1950s and 1960s that scientists began to explain how the continents were able to move with their discovery of the midocean ridges and sea-floor spreading. According to this new theory, the Theory of Plate Tectonics, seafloor spreading widened the Atlantic Ocean and separated Pangaea into the continents as we know them today. Your task is to reconstruct a model of Pangaea using the continents of today. Materials: Maps worksheet - one per student scissors glue stick blank sheet of paper 1. Each group member will roughly cut out the continents. 2. Try and fit the continents into one large landmass, similar to a jigsaw puzzle. The fit will not be perfect. 3. When you have the best fit, glue your pieces down on the blank sheet of paper. 4. Answer the following questions: A) Which two continents have the best fit? B) Why isn’t the fit perfect if the continents were all once part of Pangaea? Suggest at least two reasons.