____ __ ____ is one major belt of volcanoes. It includes many volcanoes that rim the Pacific Ocean.
What is Ring of Fire
100
A _______ is a mountain that forms in Earth's crust when molten material, or magma, reaches the surface.
What is Volcano
100
What plate collides with the Pacific Plate?
What is North American Plate
100
Why can volcanoes erupt underwater?
What is a plate could sink below the ocean which makes a pathway for magma to reach the water.
200
Where do volcano belts usually form?
What is along plate boundaries
200
_____ is a molten mixture or rock-forming substances, gases, and water from the mantle.
What is Magma
200
Your book gives an example of divergent volcanoes. What is the name of the "VALLEY" they're found along on?
Hint: East Africa
What is Great Rift Valley
200
A _______ forms above a hot spot when magma erupts through the crust and reaches the surface.
What is a volcano
300
How do volcanoes occur?
What is A.where two plates pull apart, or diverge. The crack in the crust allow magma to reach the surface. B. Also when two plates come together, of converge.
300
When magma reaches the surface, it is called ____
What is lava
300
The resulting volcanoes sometime create a string of islands called an ______ ___.
What is island arc
300
How does an earthquake effect a volcano?
What is it can build up more pressure so the magma explosively erupts.
400
How were the Hawaiian Islands formed?
What is a volcano would erupt and create more land, then the plates would shift to one direction where the volcano erupts again and forms another island.
400
What common element is found in magma?
What is silica
400
The melting point of the mantle in the wedge is lowered. So, the mantle partially melts. The magma that forms as a result rises up. This magma can break through the ocean floor, creating _________.
What is volcanoes
400
What is the most famous volcano in the United States?
What is Mt. St. Helens
500
Where are most of the Ring of Fire's volcanoes located? (North, East, South or West)
What is East
500
DOUBLE POINTS!
What are the three activity stages scientists classify volcanoes as?
What is active, dormant, and extinct
500
How did Mount Erebus form?
What is molten rock would pack over the cold ice adding layers to the snow. Scientists believe that it lies over an area where material from Earth's mantle rises and then melts.
500
How long does the average volcano eruption last for?
Hint: more than a day