1) Another word for an ash fall is a pyroclastic a) flow b) fall c) cloud 2) Pyroclastic flows can travel up to ---- km/hr a) 50 b) 100 c) 200 3) The most destructive volcanic activity is a/an a) ash fall b) pyroclastic flow c) lava d) lahar 4) A lava flow is a a) stream of molten rock b) underground tunnel of molten rock c) explosive debris made up of volcanic bombs d) ash cloud 5) A lahar is otherwise known as a a) lava flow b) mud flow c) ash fall 6) Volcanic gases consist mainly of a) steam and CO2 b) steam CO2 and sulphur c) steam only 7) A tsunami is caused by a) disturbances on the sea floor b) underwater volcanic eruptions c) earthquakes d) all of the above 8) Most hazards associated with a volcano will only occur very close to the vent but the exception is a) lava flows b) ash falls c) lahars d) landslides

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