Volcano+Map+and+Analysis+Questions


 * Analyze the Results**
 * 1. According to your map, where are volcanoes that always have nonexplosive eruptions located?**
 * 2. Where are volcanoes that always erupt explosively located?**
 * 3.Where are volcanoes that erupt in both ways located**
 * 4. If volcanoes get their magma from the crust below them, what can you say about the silica content of Earth's crust under the oceans?**
 * 5. What is the composition of the crust under the continents? How do we know?**
 * 6. What is the source of materials for volcanoes that erupt in both ways? How do you know?**
 * 7. Do the locations of volcanoes that erupt in both ways make sense, based on your answers to questions 4 and 5? Explain.**
 * Applying Your Data**
 * Volcanoes are present on other planets. If a planet had only nonexplosive volcanoes on its surface, what would we be able to infer about the planet? If a planet had volcanoes that ranged from nonexplosive to explosive, what might that tell us about the planet?**