How Science Works: Journey to Etna: Lava Flow and Gas Emissions

The video tutorial explores the journey of magma from deep within the Earth to its eruption as lava, forming igneous rock. It distinguishes between two types of lava, 'A'a and Pahoehoe, and highlights the importance of collecting fresh lava samples for analysis. The tutorial also emphasizes the significant role volcanoes play in shaping the Earth's atmosphere and climate, noting their emission of gases and metals, including sulfur dioxide and gold.

What is the term used for molten rock before it erupts from a volcano?

• Sedimentary rock

• Igneous rock

• Lava

• Magma

Which type of lava is described as smooth and resembling coils of rope?

• 'A'a

• Pahoehoe

• Rhyolitic

• Basaltic

Why is it important to collect fresh lava samples for analysis?

• To study the lava's color

• To measure the temperature of the lava

• To understand the type of magma present

• To observe the cooling process

How much sulfur dioxide does Mount Etna emit daily?

• 1,000 tons

• 2,000 tons

• 5,000 tons

• 4,000 tons

What is one of the potential impacts of a large volcanic eruption on the climate?

• Change in climate for a few years

• Decrease in atmospheric pressure

• Increase in global temperatures

• Permanent alteration of weather patterns