Caldera

The video explains the process of a magma chamber collapse leading to the formation of a caldera, which can span tens to hundreds of kilometers. It also covers historical explosive eruptions, such as the Toba eruption 75,000 years ago, which can result in caldera formation.

What happens to the ground when a magma chamber empties?

• It remains unchanged.

• It collapses.

• It expands.

• It rises.

How large can calderas be?

• A few kilometers across

• Tens to hundreds of kilometers across

• A few meters across

• Thousands of kilometers across

What is a common cause for the formation of calderas?

• Tsunamis

• Volcanic eruptions

• Landslides

• Earthquakes

Which historical eruption is mentioned as an example of caldera formation?

• Mount St. Helens

• Krakatoa

• Toba

• Vesuvius

Approximately how many years ago did the Toba eruption occur?

• 75,000 years ago

• 50,000 years ago

• 25,000 years ago

• 100,000 years ago