Volcanoes and Volcanic Activity
Physics ⇒ Earth and Space Physics
Volcanoes and Volcanic Activity starts at 7 and continues till grade 12.
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Describe how the tilt and seismic activity of a volcano can be used to predict eruptions.
Describe the main differences between shield volcanoes and composite volcanoes.
Describe the process of magma formation beneath mid-ocean ridges.
Describe the relationship between plate tectonics and the global distribution of volcanoes.
Explain how subduction zones lead to the formation of volcanoes.
Explain how volcanic eruptions can contribute to the formation of fertile soils.
Explain the role of pressure in the formation and eruption of magma.
If a volcano erupts and releases 1.5 × 1012 kg of ash into the atmosphere, and the ash spreads over an area of 3 × 106 km2, what is the average ash deposit per square kilometer?
Which gas is most abundant in volcanic emissions?
(1) Carbon dioxide
(2) Sulfur dioxide
(3) Water vapor
(4) Methane
Which of the following best describes pyroclastic flow?
(1) Slow-moving lava
(2) Fast-moving current of hot gas and volcanic matter
(3) Ash falling from the sky
(4) Water vapor released from a volcano
Which of the following best explains why some volcanic eruptions are more explosive than others?
(1) The color of the lava
(2) The amount of water vapor in the magma
(3) The age of the volcano
(4) The altitude of the volcano
Which of the following is a primary cause of volcanic activity?
(1) Plate tectonics
(2) Solar radiation
(3) Wind erosion
(4) Ocean currents
A volcano that is currently erupting or shows signs of erupting soon is called _______.
If a volcano has not erupted in recorded history but shows signs of activity, it is classified as _______.
If the temperature of magma increases, its viscosity generally _______.
The movement of magma through cracks in the Earth's crust is called _______.
A caldera is formed when a volcano's summit collapses after a major eruption. True or False?
Hotspots are responsible for the formation of volcanic islands such as the Hawaiian Islands. Yes or No?
True or False: All volcanoes are found at plate boundaries.
True or False: The viscosity of magma affects the explosiveness of a volcanic eruption.
