Go to the Quizzes Page Volcanic Hazards 0% 98 Created by AbuBakrShalabi Please write your name and email to receive your certificate. 1 / 20 What is lava? Magma Small rocks Molten rock outside a volcano Molten rocks inside a volcano 2 / 20 What is one hazard that can be cause by a volcanic eruption? air pollution blizzards weathering of rocks tornadoes 3 / 20 Scientists monitor volcano changes and use sensors to measure the concentration of volcanic gases such as sulfur dioxide to ......................... Know if the volcano becomes an extinct one Study the structure of Earth Collect these gases and use them in laboratories Predict if the volcano will erupt soon 4 / 20 Which classification system is used to rate hurricane severity? Richter scale Saffir-Simpson scale Enhanced Fujita scale Modified Mercalli scale 5 / 20 A volcanic eruption can alter the climate because.......... they trigger tsunami they heat the atmosphere geologists have determined it to be so dust and gas in the upper atmosphere reflect and absorb solar radiation 6 / 20 How many volcanoes erupt each year, on average around 20 more than 100 around 60 less than 5 7 / 20 Why does magma tend to rise to the surface? It contains very little silica. It is denser than the surrounding material. It has large amounts of silica. It is less dense than the surrounding material. 8 / 20 This image shows the plate boundaries in bold black lines and the ring of fire in red. What is the relationship between the boundaries and the most common area of active volcanoes? Most volcanic zones on Earth are in areas of colder climates Most volcanic zones on Earth are near plate boundaries Most volcanic zones on Earth are near the southern part of the world Most volcanic zones on Earth are focused on the antarctic place 9 / 20 A volcano that has erupted in the last 2000 years but not recently is known as........... Dormant Extinct Active Angry 10 / 20 How are the hot spot volcanoes formed? Hot spots form along divergent boundaries where the plates part away from each other. Hot spots form along convergent boundaries where the plates come closer to each other. Hot spots form when plumes of magma rise from Earth's mantle to Earth’s crust. Hot spots form at both convergent and divergent boundaries where the plates move. 11 / 20 Which type of volcano is formed in the middle of the tectonic plates? Extinct volcano Active volcano Hot spot volcano Dormant volcano 12 / 20 The following are signs that alert for a volcanic eruption EXCEPT ______________. Deformation Gas emissions Weather changes Earthquakes 13 / 20 what are the 3 types of volcano? dormant volcano active volcano living volcano extinct volcano 14 / 20 If a geologist detects many small earthquakes near an active volcano, what does this mean? The volcano is no dormant The volcano is going to collapse The volcano is blocking plate movement The volcano may be about to erupt 15 / 20 What is the technology used to predict volcanic eruptions so that populations can be warned of a possible eruption? GPS Seismometer that detects earthquakes Gas Sensors Doppler Radar 16 / 20 How could predicting the future eruption of a volcano benefit people? Work to delay the eruption or eliminate it Know the exact time of the volcanic eruption Alert people to evacuate the area before the eruption Enable people to climb hills and watch the eruption 17 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. dike caldera volcano batholith 18 / 20 Which statement accurately describes a pyroclastic flow? Pyroclastic flows move very quickly but are relatively cool. Pyroclastic flows move at speeds of more than 100 km/hr and have temperatures over 1,000°C. Pyroclastic flows move very slowly, and are rarely deadly. Pyroclastic flows occur when the snow and ice of the summit are melted and mix with the ash and mud on the mountain. 19 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? ground deformation animal behavior change in shape of the volcano earthquake swarms 20 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. convergent plate boundary hot spot divergent plate boundary transform plate boundary Your score is 0% Restart quiz Go to the Quizzes Page