Download Astronomy - Geneva 304

Earth Science
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Chapter 4
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Worksheet
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Plate Tectonics, Part I
Mid-Atlantic Ridge
1. Locate on the map below each feature listed. Match each feature to its letter on the map. (0.20 points each)
_____ Mid-Atlantic Rift
_____ trench
_____ younger rocks of the ridge
_____ older rocks of the ridge
_____ Mid-Atlantic Ridge
2. Follow the directions to color the map. (0.25 points each)
A. Color the area RED where hot material rises from the mantle.
B. Show the gradual change of young rocks becoming older rocks in the Mid-Atlantic Ridge. Color
the younger rocks ORANGE; color the older rocks YELLOW.
C. Color the trench areas GREEN, the ocean floor BLUE, and the continents BROWN.
3. Draw two red arrows to indicate the direction of plate movement along the ridge. (0.25 points)
Plate Boundaries
Four diagrams are shown in the table below. Explain each diagram to complete the table. (0.25 points each)
Plate Tectonics Questions (0.25 points each)
1. What is a plate boundary?
2. What forms in the rifts of spreading boundaries?
3. What might happen when two plates bump into each other?
4. What forms where an oceanic plate begins to move down in a subduction zone?
5. Pressures along boundaries of colliding sections of continental crust may fold rock layers, producing what
landforms?
6. What tow plates meet at the San Andreas fault?
7. What type of boundary is the San Andreas fault?
8. Convection currents transfer ______________ through ____________________________________ .