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