Go to the Quizzes Page Volcanic Hazards 0% 98 Created by AbuBakrShalabi Please write your name and email to receive your certificate. 1 / 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 Know if the volcano becomes an extinct one Collect these gases and use them in laboratories 2 / 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 3 / 20 A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up. batholith dike caldera volcano 4 / 20 what are the 3 types of volcano? active volcano extinct volcano living volcano dormant volcano 5 / 20 The following are signs that alert for a volcanic eruption EXCEPT ______________. Gas emissions Weather changes Deformation Earthquakes 6 / 20 What is lava? Molten rocks inside a volcano Molten rock outside a volcano Magma Small rocks 7 / 20 If a geologist detects many small earthquakes near an active volcano, what does this mean? The volcano is going to collapse The volcano is no dormant The volcano may be about to erupt The volcano is blocking plate movement 8 / 20 How could predicting the future eruption of a volcano benefit people? 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 Know the exact time of the volcanic eruption 9 / 20 What is the technology used to predict volcanic eruptions so that populations can be warned of a possible eruption? Seismometer that detects earthquakes Gas Sensors GPS Doppler Radar 10 / 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 along convergent boundaries where the plates come closer to each other. Hot spots form when plumes of magma rise from Earth's mantle to Earth’s crust. 11 / 20 A volcano that has erupted in the last 2000 years but not recently is known as........... Dormant Extinct Angry Active 12 / 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. 13 / 20 Which classification system is used to rate hurricane severity? Saffir-Simpson scale Enhanced Fujita scale Richter scale Modified Mercalli scale 14 / 20 How many volcanoes erupt each year, on average around 60 less than 5 more than 100 around 20 15 / 20 What is one hazard that can be cause by a volcanic eruption? weathering of rocks tornadoes blizzards air pollution 16 / 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 heat the atmosphere they trigger tsunami 17 / 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. 18 / 20 The Hawaiian Islands are examples of volcanoes that are associated with a _______. transform plate boundary convergent plate boundary divergent plate boundary hot spot 19 / 20 Which of the following is NOT studied by geologists to predict volcanic eruptions? change in shape of the volcano earthquake swarms ground deformation animal behavior 20 / 20 Which type of volcano is formed in the middle of the tectonic plates? Dormant volcano Hot spot volcano Active volcano Extinct volcano Your score is 0% Restart quiz Go to the Quizzes Page