A
A volcano is an opening in the -------'s surface.
Earth
A place in the Earth's surface that has broken open and has lava coming out is called _______?
a volcano
Why do many people choose to live near a volcano?
The lava and ash make the soil good for farming.
How long did it take the islands of Hawaii to form?
millions of years
What comes out of a volcano?
ash, gas and lava
What is another way to say a volcano explodes?
it erupts
How do people in Iceland use the heat from volcanoes?
To make electricity
What do scientists wear when they work on an active volcano?
a helmet and a special suit
Hot, melted rock is called_________.
lava
Small bits of rock and lava that shoot out of a volcano is called___________.
ash
Why do scientists study volcanoes?
To look for clues that it might be ready to erupt
What are some clues that a volcano is ready to erupt?
The ground is rumbling and shaking
Steam is coming out
The volcano is getting bigger
New cracks are forming
What escapes when a volcano explodes?
gas
A volcano that erupts often is said to be __________?
active
Why is it helpful to know when a volcano might erupt?
So that the people who live and work nearby can be warned and get out of the area
When Mount Saint Helen erupted, what did the mud do to the town below?
buried houses, cars, roads, and bridges
When lava cools, it becomes what?
rock (page 9)
When a volcano has not erupted for a long time, we say it is sleeping or ____________.
dormant
How were the islands of Hawaii formed?
Volcanoes erupted under the sea
When Mount Saint Helen erupted, what happened to the snow on the mountain?
It melted from the heat.