Which pair of rock materials can a volcano throw into the air during an eruption?

• Snow and ice
• Lava and ash
• Leaves and rain

Which words describe a large, explosive eruption?

• Big and loud
• Cold and still
• Quiet and chilly

Volcanic ash is made of tiny pieces of rock.

Circle one:   True   False

What happens to lava as it cools and hardens on the ground?

• It becomes new hard rock
• It stays hot melted rock forever
• It becomes loose volcanic ash

What did the huge landslide remove during the Mount St. Helens eruption?

• The whole mountain and all nearby land
• Only the trees on the mountain slopes
• Part of the mountain's north side

To see how one volcano changed, compare a picture of it before an eruption with a picture of a different volcano afterward.

Circle one:   True   False

A field near a volcano had green grass. Later, fresh volcanic ash covered the grass. What most likely happened nearby?

• A long rain shower
• A cold snowstorm
• A volcanic eruption

Milo sees lava flowing from a volcano. He says, 'It cannot be an eruption because there was no big explosion.' Which reply checks his idea?

• Lava must shoot high to be an eruption
• Flowing lava can be an eruption
• Lava must throw out ash to be an eruption