Volcanoes Multiple Choice Questions and Answers for Practice

16. What is a volcanic tremor?

1. A type of volcanic gas
2. A low-frequency seismic event associated with volcanic activity
3. A type of lava flow
4. A type of volcanic bomb

17. Which of the following is a shield volcano?

1. Mount St. Helens in the United States
2. Mount Vesuvius in Italy
3. Mauna Loa in Hawaii
4. Krakatoa in Indonesia

18. What is a volcanic vent?

1. A type of volcanic gas
2. A depression at the top of a volcano formed by eruptions
3. A fissure in the Earth's crust from which lava erupts
4. A type of lava flow

19. What is a volcanic bomb?

1. A large boulder ejected during a volcanic eruption
2. A fast-moving mudflow composed of volcanic ash and water
3. A cloud of volcanic ash and gas that flows rapidly down the side of a volcano
4. A type of lava flow

20. What is a lava tube?

1. A tube-shaped volcanic vent
2. A type of volcanic bomb
3. A type of volcanic gas
4. A tunnel formed by the flow of lava

21. What is a volcanic avalanche?

1. A type of volcanic gas
2. A rapid flow of hot volcanic gases and ash down the slopes of a volcano
3. A large landslide of volcanic debris and rock
4. A type of lava flow

22. What is a volcanic plume?

1. A type of volcanic gas
2. A column of hot volcanic ash and gas rising above a volcano
3. A type of lava flow
4. A fissure in the Earth's crust from which lava erupts

23. What is a volcanic fissure?

1. A type of volcanic gas
2. A tube-shaped volcanic vent
3. A long crack in the Earth's surface from which lava erupts
4. A type of lava flow

24. How does volcanic activity contribute to the Earth's atmosphere?

1. By releasing greenhouse gases
2. By depleting the ozone layer
3. By increasing air pollution
4. By releasing sulfur dioxide, which can lead to acid rain and global cooling

25. What is the most common gas emitted during volcanic eruptions?

1. Oxygen (O2)
2. Nitrogen (N2)
3. Carbon dioxide (CO2)
4. Hydrogen (H2)