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