Volcanoes

What type of volcano is Mt. St. Helens?

• shield
• composite
• cinder cone
• active

What kind of plate boundary is shown here?

• divergent

• convergent

• transform

What kind of volcano is this?

• Stratovolcano

• Shield volcano

• Cinder cone volcano

Where do volcanoes typically form?

• At plate boundaries.

• In the middle of tectonic plates.

Which of the following is NOT a feature of shield volcanoes?

• Some of the biggest mountains in the world.

• Made of layers of just lava.

• Made of layers of ash and lava.

• Very wide.

What is the hollow below a volcano that collects gases and magma?

• Slope

• Magma chamber

• Central vent

• Summit crater

What kind of eruptions do shield volcanoes have?

• Explosive eruptions.

• Quiet eruptions.

What is a volcano?

• A weak spot in Earth’s crust where magma can come to the surface.

• A mix of rocks, minerals, gases, and water from the mantle.

• Hot semifluid rock that becomes solid rock as it cools off.

• A special kind of mountain.

This is the name for the chain of volcanoes and earthquakes around the edge of the Pacific Plate.

• The Subduction Zone

• The Ring of Fire

• The Seismic-Tectonic Area

What is magma called when it reaches the surface of Earth?

• Lava

• viscosity

• toxic gas