1) What part of the volcano serves as the region under the surface of the Earth where hot molten magma is collected?   a) magma chamber b) main vent c) secondary vent d) lava flow 2) Which of the following best describes a volcano?   a) A dense forest with tall trees b) A wide, sandy beach c) A cone-shaped mountain formed by layers of lava and volcanic ash d) A flat, grassy plain 3) What type of volcano is Mayon Volcano? a) shield volcano b) composite volcanoes c) A dense forest with tall treeslava domes d) cinder cones 4) Why do shield volcanoes have a broad, dome-like shape? a) Due to the rapid cooling of lava after eruptions b) Because they are formed by a mixture of lava and ash c) Because of their explosive eruptions d) Due to the low-viscosity lava that spreads over wide areas 5) What is the main difference between a stratovolcano and a cinder cone volcano? a) Stratovolcanoes have steeper sides than cinder cone volcanoes. b) Stratovolcanoes are smaller in size than cinder cone volcanoes. c) Cinder cone volcanoes have a broader base than stratovolcanoes. d) Both volcanoes erupt only once in their lifetime. 6) Which of the following statements is CORRECT? a) Inactive volcanoes are those that erupted recently and showing regular activity while active volcanoes exhibit no sign of volcanic activity. b) Active volcanoes exhibit volcanic activity within the last 10 000 years while inactive volcanoes have no record of eruption. c) Active volcanoes do not have magma supply while inactive volcanoes have magma supply. d) Inactive volcanoes exhibit sign of emissions of molten materials and gases while active volcanoes show no sign of emission 7) The eruption of Mount Pinatubo in the Philippines was characterized as an excessively explosive type of eruption of gas and pyroclastic. Which type of the eruption is this? a) Phreatomagmatic b) Plinian c) Phreatic d) Strombolian 8) A scientist claims that a specific volcano poses a high risk to nearby communities due to its history of explosive eruptions. Which type of volcano is she most likely referring to, and why? a) Caldera, because it is extinct b) Cinder cone, because of its height c) Shield volcano, because of its frequent, gentle eruptions d) Stratovolcano, because of its potential for powerful, explosive eruptions 9) Which are needed in the formation of magma? a) composition, pressure, temperature b) pressure, temperature, distance from the surface c) composition, pressure, density d) pressure, temperature, volume 10)  Which is TRUE about the composition of magma? a) It contains ash, dust, and lava b) It contains dissolved gases only. c) It contains both dissolved gases and fragmented materials. d) It contains fragmented rocks only. 11) Which is NOT a common gas in magma? a) water vapor b) carbon dioxide c) methane gas d) sulfur dioxide 12) What would magma with the highest viscosity contain? a) a high silica content and low temperature. b) a low silica content and high temperature. c) a high silica content and high temperature. d) a low silica content and low temperature. 13) What provides the force that causes magma to erupt to the surface? a) the gravity in the lithosphere b) the dissolved gases trapped in the magma c) the silica in the magma d) the density of the magma 14) Which type of lava will offer the least resistance to flow? a) Andesitic b) Rhyolitic c) Basaltic d) Basaltic and Rhyolitic 15) If a volcano’s magma is high in silica, how will you describe to its volcanic activity? a) It will erupt explosively b) It will produce dark-colored lava c) It will erupt quietly d) It will remain dormant 16) Where does geothermal energy come from? a) Sunlight b) Rivers c) Ocean tides and waves d) Heat from the Earth 17) The name geothermal is a combination of the word "geo", which means______ and "thermal", which means __________.   a) land; water b) earth; air c) air; fire d) earth; heat 18) Which statement is TRUE about geothermal energy? a) It is a sustainable energy source b) It causes global warming c) Its supply is limited d) It generates greenhouse gases 19) Which locations can be good sources of geothermal energy? a) Ocean, river, sea b) Geyser, ocean, river c) Geyser, hot spring, steam vents d) Geyser, hot spring, ocean 20) Which shows the correct sequence of the flow of energy in a Geothermal Power Plant?Which locations can be good sources of geothermal energy? a) hot water →steam → turbine → generator→ electricity b) generator→ turbine→ steam→ hot water→ electricity c) electricity → steam→ generator→ turbine→ hot water d) hot water→ generator→ turbine→ steam→ electricity

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