Question

1. engage which statements are accurate generalizations about volcanic eruptions? select all that apply.

• volcanoes erupt lava.
• the type of eruption depends on the type of magma in the volcano.
• volcanic eruptions include seismic activity (earthquakes).
• volcanic eruptions are explosive.
• scientists cannot predict when a volcano will erupt or how explosive it will be.
• an eruption can build up or tear down a volcanic mountain.
• lava flows are the most destructive kind of volcanic eruption.
• volcanic eruptions occur both on land and on the ocean floor.

Explanation:

1. "Volcanoes erupt lava" - Volcanic eruptions involve the release of lava (molten rock) onto the surface.
2. "The type of eruption depends on the type of magma in the volcano" - Magma’s viscosity, gas content, etc., determine if an eruption is explosive or effusive.
3. "Volcanic eruptions include seismic activity (earthquakes)" - Movement of magma and volcanic processes often trigger earthquakes.
4. "An eruption can build up or tear down a volcanic mountain" - Eruptions deposit material (building up) or cause collapses/explosions (tearing down).
5. "Volcanic eruptions occur both on land and on the ocean floor" - Submarine volcanoes erupt underwater, and terrestrial volcanoes erupt on land.

Incorrect statements:

• "Volcanic eruptions are explosive" – Some eruptions (e.g., Hawaiian) are effusive, not explosive.
• "Scientists cannot predict when a volcano will erupt or how explosive it will be" – Scientists can monitor and predict eruptions (to some extent) using seismic data, gas emissions, etc.
• "Lava flows are the most destructive kind of volcanic eruption" – Pyroclastic flows (not lava flows) are often more destructive.

Answer:

• Volcanoes erupt lava.
• The type of eruption depends on the type of magma in the volcano.
• Volcanic eruptions include seismic activity (earthquakes).
• An eruption can build up or tear down a volcanic mountain.
• Volcanic eruptions occur both on land and on the ocean floor.