Go to the Quizzes Page Volcanic Hazards 0% 98 Created by AbuBakrShalabi Please write your name and email to receive your certificate. 1 / 20 The following are signs that alert for a volcanic eruption EXCEPT ______________. Deformation Earthquakes Gas emissions Weather changes 2 / 20 what are the 3 types of volcano? extinct volcano dormant volcano active volcano living volcano 3 / 20 Why does magma tend to rise to the surface? It is denser than the surrounding material. It has large amounts of silica. It contains very little silica. It is less dense than the surrounding material. 4 / 20 A volcano that has erupted in the last 2000 years but not recently is known as........... Extinct Angry Dormant Active 5 / 20 How many volcanoes erupt each year, on average more than 100 around 20 around 60 less than 5 6 / 20 What is one hazard that can be cause by a volcanic eruption? tornadoes weathering of rocks air pollution blizzards 7 / 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 near the southern part of the world Most volcanic zones on Earth are focused on the antarctic place Most volcanic zones on Earth are in areas of colder climates 8 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? ground deformation change in shape of the volcano animal behavior earthquake swarms 9 / 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 Collect these gases and use them in laboratories Know if the volcano becomes an extinct one Study the structure of Earth 10 / 20 Which classification system is used to rate hurricane severity? Modified Mercalli scale Saffir-Simpson scale Richter scale Enhanced Fujita scale 11 / 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 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 quickly but are relatively cool. Pyroclastic flows move very slowly, and are rarely deadly. 12 / 20 A volcanic eruption can alter the climate because.......... geologists have determined it to be so dust and gas in the upper atmosphere reflect and absorb solar radiation they trigger tsunami they heat the atmosphere 13 / 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 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. Hot spots form at both convergent and divergent boundaries where the plates move. 14 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. caldera dike batholith volcano 15 / 20 Which type of volcano is formed in the middle of the tectonic plates? Extinct volcano Dormant volcano Active volcano Hot spot volcano 16 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. hot spot transform plate boundary convergent plate boundary divergent plate boundary 17 / 20 What is lava? Magma Molten rock outside a volcano Molten rocks inside a volcano Small rocks 18 / 20 What is the technology used to predict volcanic eruptions so that populations can be warned of a possible eruption? Gas Sensors Seismometer that detects earthquakes Doppler Radar GPS 19 / 20 How could predicting the future eruption of a volcano benefit people? Know the exact time of the volcanic eruption Alert people to evacuate the area before the eruption Work to delay the eruption or eliminate it Enable people to climb hills and watch the eruption 20 / 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 may be about to erupt The volcano is blocking plate movement Your score is 0% Restart quiz Go to the Quizzes Page