Go to the Quizzes Page Volcanic Hazards 0% 158 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 is lava? Magma Small rocks Molten rock outside a volcano Molten rocks inside a volcano 3 / 20 How could predicting the future eruption of a volcano benefit people? 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 Know the exact time of the volcanic eruption 4 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? change in shape of the volcano ground deformation animal behavior earthquake swarms 5 / 20 How many volcanoes erupt each year, on average less than 5 more than 100 around 20 around 60 6 / 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 when plumes of magma rise from Earth's mantle to Earth’s crust. Hot spots form along convergent boundaries where the plates come closer to each other. 7 / 20 A volcano that has erupted in the last 2000 years but not recently is known as........... Active Extinct Dormant Angry 8 / 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 blocking plate movement The volcano is going to collapse The volcano is no dormant 9 / 20 Which type of volcano is formed in the middle of the tectonic plates? Hot spot volcano Active volcano Dormant volcano Extinct volcano 10 / 20 Why does magma tend to rise to the surface? It contains very little silica. It has large amounts of silica. It is less dense than the surrounding material. It is denser than the surrounding material. 11 / 20 Which statement accurately describes a pyroclastic flow? 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 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. 12 / 20 what are the 3 types of volcano? living volcano extinct volcano dormant volcano active volcano 13 / 20 A volcanic eruption can alter the climate because.......... they trigger tsunami geologists have determined it to be so dust and gas in the upper atmosphere reflect and absorb solar radiation they heat the atmosphere 14 / 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 the southern part of the world Most volcanic zones on Earth are near plate boundaries Most volcanic zones on Earth are focused on the antarctic place 15 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. volcano batholith dike caldera 16 / 20 Which classification system is used to rate hurricane severity? Saffir-Simpson scale Richter scale Enhanced Fujita scale Modified Mercalli scale 17 / 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 18 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. hot spot transform plate boundary convergent plate boundary divergent plate boundary 19 / 20 What is one hazard that can be cause by a volcanic eruption? tornadoes air pollution blizzards weathering of rocks 20 / 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 Study the structure of Earth Predict if the volcano will erupt soon Collect these gases and use them in laboratories Your score is 0% Restart quiz Go to the Quizzes Page