Volcanoes

What is a volcano?

• A winter blizzard that causes freezing rain.

• A fracture, or opening, in the Earth's crust.

• an earthquake with lava

What is magma?

• Molten liquid rock.

• A type of rock that is formed from small deposits of minerals.

• The layer of rock closest to the top.

What are the three states of volcanic activity?

• big, medium, small

• active, dormant, extinct

• oceanic, landmass, decomposed

• dormant, alive, erupting

What kind of sides does a shield volcano have?

• steep sloping

• gradual sloping

• no slope

What kind of sides does a cinder cone volcano have?

• rough and rocky

• smooth and flat

• straight and steep

How high did the volcano grow?

• 300 feet

• 1000 feet

• 1300 feet

What are stratovolcanoes made of?

• layers of lava, ash and pumice

• sediments and minerals

• pumpkin spice latte

• granite, quartz and sandstone

Who are vulcanologists?

• scientists who study volcanoes

• scientists who study Hawaii

• scientists who study rock climbing

In what year did David A. Johnston watch Mount St. Helens erupt?

• 2020

• 1990

• 1980

In the world there are nearly 1500 potentially active volcanoes.

• True

• False