Download Pangaea Wegener video guide 2016 17

Name ______________________________________ Class _____Due date ____
VideoGuide to Pangaea and Plate Tectonics
1) Alfred Wegener noticed that the shapes of our present day continents could fit
together like puzzle pieces. He called this massive land mass “Pangaea”
meaning all/whole earth. He theorized further that around 250 million years ago
these continents drifted apart. His theories needed evidence to support them.
Directions: List and describe 3 pieces of evidence below.
1. Evidence: ________________________________
Explanation:
2. Evidence: __________________________________
Explanation:
3. Evidence: ____________________________________
Explanation:
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2) Dr. Harry Hess helped prove Wegener’s theory by discovering the “driving force”
behind what moved the crustal plates. Describe in detail how the mantle’s convection
currents act like wheels under a conveyer belt. Then draw a diagram and label it
with the following geologic terms appropriately: 1. denser crust; 2. new crust;
3. subduction zone; 4. sea-floor spreading; and 5. ocean trench. 6. heat from core.
Description: The convection currents in the earth’s mantle act like wheels under a
conveyer belt in that they….
Diagram:
2) What does the term Pangaea mean? ____________________________
3) Where does the heat come from that starts convection currents in the mantle? What
changes happen in the magma that keep the current moving?