1. About how many active volcanoes have erupted more than once?
510
520
530
540
2. Which one of the following substances does NOT erupt from a volcano?
Lava
Tephra
Plasma
Flourine Gas
3. Where are most volcanoes started?
Beneath the ocean
Near other volcanoes
Near mountains
The center of the earth
4. The most recognizable type of volcano is shaped like a _______.
Caldera
Hill
Cone
Plateau
5. How far beneath the earth does the creation of magma usually take place?
40-60 km
60-80 km
80-100 km
100-120 km
6. What happens during a nonexplosive eruption?
A large amount of tephra is expelled
The magma will flow down from the vent
Magma is flung into the air
The top of the volcano explodes
7. How much do the earth's plates move per year?
Several centimeters
Several meters
Several feet
None of the above
8. Which of the following is NOT a type of plate boundary?
Transform Boundaries
Divergent Boundaries
Convergent Boundaries
Tectonic Boundaries
9. Which is NOT a way in which magma flows?
In a Pahoehoe
In a Tephra
In Chunks
In a smooth, billowy fashion
10. Which of the following is NOT a volcanic form?
Volcanic Edifice
Volcanic Calders
Domes of Lava
