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 volcano that has erupted in the last 2000 years but not recently is known as........... Angry Dormant Active Extinct 2 / 20 what are the 3 types of volcano? active volcano dormant volcano extinct volcano living volcano 3 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? change in shape of the volcano earthquake swarms animal behavior ground deformation 4 / 20 Which statement accurately describes a pyroclastic flow? Pyroclastic flows move very slowly, and are rarely deadly. 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 at speeds of more than 100 km/hr and have temperatures over 1,000°C. 5 / 20 How could predicting the future eruption of a volcano benefit people? Work to delay the eruption or eliminate it Alert people to evacuate the area before the eruption Enable people to climb hills and watch the eruption Know the exact time of the volcanic eruption 6 / 20 Which type of volcano is formed in the middle of the tectonic plates? Dormant volcano Hot spot volcano Active volcano Extinct volcano 7 / 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 at both convergent and divergent boundaries where the plates move. Hot spots form when plumes of magma rise from Earth's mantle to Earth’s crust. 8 / 20 Which classification system is used to rate hurricane severity? Modified Mercalli scale Saffir-Simpson scale Richter scale Enhanced Fujita scale 9 / 20 What is lava? Small rocks Magma Molten rock outside a volcano Molten rocks inside a volcano 10 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. divergent plate boundary hot spot convergent plate boundary transform plate boundary 11 / 20 How many volcanoes erupt each year, on average more than 100 less than 5 around 60 around 20 12 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. volcano caldera dike batholith 13 / 20 A volcanic eruption can alter the climate because.......... they trigger tsunami they heat the atmosphere dust and gas in the upper atmosphere reflect and absorb solar radiation geologists have determined it to be so 14 / 20 Why does magma tend to rise to the surface? It is less dense than the surrounding material. It is denser than the surrounding material. It has large amounts of silica. It contains very little silica. 15 / 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 16 / 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 Predict if the volcano will erupt soon Study the structure of Earth Collect these gases and use them in laboratories 17 / 20 The following are signs that alert for a volcanic eruption EXCEPT ______________. Gas emissions Deformation Weather changes Earthquakes 18 / 20 What is one hazard that can be cause by a volcanic eruption? weathering of rocks air pollution blizzards tornadoes 19 / 20 What is the technology used to predict volcanic eruptions so that populations can be warned of a possible eruption? Seismometer that detects earthquakes GPS Gas Sensors Doppler Radar 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