ISP 203 Exam 2 () || Questions & Answers (Graded A+)ISP 203 Exam 2 () Questions & Answers

ISP 203 Exam 2 () || Questions & Answers (Graded A+) ISP 203 Exam 2 () || Questions & Answers (Graded A+) Divergent boundary - ANSWER - Boundary where tectonic plates move apart At which type of plate boundary is likely to have magma generated by decompression melting? - ANSWER - Divergent Most of the world's above sea level volcanoes are ___________ and occur at ____________. - ANSWER - stratovolcanoes, subduction zones An igneous rock with tiny or no visible crystals likely cooled: - ANSWER - At the surface of the Earth A volcano that has magma that is viscous with lots of gas would be more likely to erupt: - ANSWER - Effusively How are lahars and pyroclastic flow hazards related? - ANSWER - Pyroclastic flows can block up streams and create lakes, which can later causing flooding and lahars, Pyroclastic flows are hot and can melt snow and ice, which can trigger a lahar Hawaiian type of eruptions, which are _______, have magmas that are______. - ANSWER - Effusive, felsic and high viscosity The addition of water ______ the melting temperature of rock. - ANSWER - lowers Volcanoes only occur at plate boundaries. - ANSWER - FALSE Which type of plate boundary does not typically generate volcanoes? - ANSWER - Transform Based on the tectonic setting of the Ring of Fire, what kind of volcanoes would you expect to be most common? - ANSWER - Fissure Why do shield volcanoes have a different shape from stratovolcanoes? - ANSWER - They are made up of layers of lava instead of lava and tephra What is earthquake early warning? - ANSWER - A system that uses the P-wave arrival to gives up to several minutes of advance notice of more damaging shaking that will come later What can influence magma composition? - ANSWER - The source rock for the magma, The different melting/freezing points of minerals in the rock, The rock that the magma moves through