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