Go to the Quizzes Page Volcanic Hazards 0% 98 Created by AbuBakrShalabi Please write your name and email to receive your certificate. 1 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. dike caldera volcano batholith 2 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? earthquake swarms change in shape of the volcano animal behavior ground deformation 3 / 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 plate boundaries 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 the southern part of the world 4 / 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 Doppler Radar Gas Sensors 5 / 20 How could predicting the future eruption of a volcano benefit people? Know the exact time of the volcanic eruption Enable people to climb hills and watch the eruption Work to delay the eruption or eliminate it Alert people to evacuate the area before the eruption 6 / 20 A volcano that has erupted in the last 2000 years but not recently is known as........... Angry Dormant Extinct Active 7 / 20 Scientists monitor volcano changes and use sensors to measure the concentration of volcanic gases such as sulfur dioxide to ......................... Predict if the volcano will erupt soon Know if the volcano becomes an extinct one Collect these gases and use them in laboratories Study the structure of Earth 8 / 20 The following are signs that alert for a volcanic eruption EXCEPT ______________. Earthquakes Deformation Weather changes Gas emissions 9 / 20 What is lava? Molten rock outside a volcano Molten rocks inside a volcano Magma Small rocks 10 / 20 How many volcanoes erupt each year, on average less than 5 around 60 more than 100 around 20 11 / 20 A volcanic eruption can alter the climate because.......... dust and gas in the upper atmosphere reflect and absorb solar radiation they trigger tsunami they heat the atmosphere geologists have determined it to be so 12 / 20 Which statement accurately describes a pyroclastic flow? Pyroclastic flows move very slowly, and are rarely deadly. 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. 13 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. convergent plate boundary hot spot divergent plate boundary transform plate boundary 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 are the 3 types of volcano? extinct volcano active volcano dormant volcano living volcano 16 / 20 Why does magma tend to rise to the surface? It contains very little silica. It is less dense than the surrounding material. It is denser than the surrounding material. It has large amounts of silica. 17 / 20 What is one hazard that can be cause by a volcanic eruption? weathering of rocks blizzards air pollution tornadoes 18 / 20 Which type of volcano is formed in the middle of the tectonic plates? Active volcano Hot spot volcano Extinct volcano Dormant volcano 19 / 20 Which classification system is used to rate hurricane severity? Saffir-Simpson scale Modified Mercalli scale Richter scale Enhanced Fujita scale 20 / 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 at both convergent and divergent boundaries where the plates move. 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. Your score is 0% Restart quiz Go to the Quizzes Page