6.1 Volcanoes and Earth's Moving Plates

Which of the following does NOT erupt out of a volcano?

• sulfurous gas

• ash

• lava

• water

What is the world's most active volcano?

• Kilauea, Hawaii

• Hekla, Iceland

• Juneau, Alaska

• Montserrat, West Indies

Which region is known as the land of fire and ice?

• Hawaii

• Iceland

• Greenland

• Alaska

(a)   flow is when volcanic ash and debris rush down the side of a volcano.

True or False: the temperatures inside the flow of a volcano can ignite wood.

• True

• False

Which of the following are possible effects of a volcanic eruption?

• lung disease

• collapsed buildings

• blocked roads

• acid rain

• buried towns and cities

When sulfurous gases from volcanoes mixes with the water vapor in the air ______ ________is formed.

(a)  

Is magma more or less dense than the rock around it, causing it to be forced toward's Earth surface?

• more

• less

The steep-walled depression around a volcano's vent is called the (a)   .

The opening where magma is forced up and flows out onto Earth's surface as lava, forming a volcano is called a ___________.

• crater

• vent

• pipe

• chamber