Volcanoes Brain Pop

Which of the following is an opinion about volcanic activity?

• Volcanoes are made of hardened lava.
• A large number of volcanoes can be found along the edge of the Pacific Ocean.
• The 1991 eruption of Mt. Pinatubo was the scariest volcanic event in history.
• Shield volcanoes an actually create new land.

Subduction zones occur at the boundaries between:

• Nations
• Oceans
• Plains and forested lands
• Tectonic plates

What might happen if a major volcanic eruption occurred every year?

• Global temperatures might rise by several degrees.
• The earth's crust might be depleted of rocks.
• Global temperatures might cool by several degrees.
• Nothing out of the ordinary.

Why are the eruptions of stratovolcanoes usually more destructive than the eruptions of shield volcanoes?

• Magma in stratovolcanoes contains more gas.
• Lava flows out of several openings in stratovolcanoes.
• Stratovolcanoes erupt more frequently
• Magma in stratovolcanoes is hotter.

The lava from a stratovolcano is viscous. Which image shows the most viscous substance?

• A
• B
• C
• D

Hotspot volcanism is likely to be found near:

• The Ring of Fire
• Mid-ocean ridges
• Both the Ring of Fire and mid-ocean ridges.
• Neither the Ring of Fire nor mid-ocean ridges.

Which statement about dormant volcanoes must be true?

• They can never erupt again.
• They have not erupted for a very long time.
• They will erupt within the next 12 months.
• They were formerly stratovolcanoes.

Which term best describes the landmass of Hawaii's big island?

• Increasing
• Constant
• Diminishing
• Disappearing

Which of the following is a major challenge to volcano preparedness?

• Volcanoes are located far from inhabited areas.
• Eruptions are unpredictable
• Flowing lava is impossilbe to outrun
• Disaster kits are not useful in the event of an eruption.

Which of the following countries lies along the Ring of Fire?

• South Africa
• Norway
• Japan
• Iran