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