Directions: Write the letter of the correct answer.
1. Volcanic gases are initially brought to the earth's surface as
A. they dissolve through the outer walls of the volcano.
B. magma burns through pockets of gas found underground causing the gases to vent out of the
volcano.
C. volcanoes superheat vegetation on volcanoes that release the gases
D. they are dissolved in magma.
2. Which of the following statements is FALSE concerning water vapor emissions?
A. There are typically only trace amounts of water vapor emitted during a volcanic eruption
B. Water vapor emissions may benefit the planet by adding to the water cycle
C. Water vapor emissions could impact climate change by warming the earth's surface
D. Water vapor can be launched into the stratosphere due to a volcanic eruption
3. Which of the following gas is produced during volcanic eruption and is also known as a greenhouse gas?
A. carbon dioxide B. hydrochloric acid C. hydrogen sulfide D. methane
4. Mixtures of hot gas, tephra, and rock fragments that form as the eruption column collapses are called___.
A. Lava flow B. magma flow C. debris flow D. pyroclastic flow
5. Which of the following gas is not produced in volcanic eruption?
A. Carbon dioxide B. water vapor C. methane D. hydrogen sulfide