8th Grade Quiz
Chapter 12, Section 2
Volcanoes: Types of Volcanoes
VOCABULARY
1. Bits of rock or solidified lava dropped from the air are called ______________________________.
2. A broad volcano with gently sloping sides called a ______________________________________
volcano.
3. A steep-sided, loosely packed volcano made of layers of cinders and ash is called a
___________________________________________ volcano.
4. A volcano composed of repeated alternating layers of lava then cinders and ash is a
___________________________________________ volcano.
CONCEPTS
5. Fill in the chart with the missing information
Explosive Eruption
Both (Eruptions Between
Explosive and Quiet)
Quiet Eruptions
Type of Volcano
Type of Magma
granitic
medium amount of silica
Amount of Silica
in the Magma
Type of material
given off by the
volcano
cinders,
Alternating layers of
____________________,
_____________________,
and
___________________
and
_____________________
___________________
____________________,
and
____________________
Hekla, Iceland and
Name of
volcano and
country or state
in this category
___________________
6. Explain how the volcano in Paricutín, Mexico formed.
________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
7. A thick milkshake is like an explosive volcano because when you blow into the bottom of it
through a straw the __________________________ get trapped and will be released
suddenly if the pressure continues to build.
8. The two most important factors that determine whether a volcano is explosive or quiet when it
erupts are ________________________________________________________________ and
_______________________________________________________________.
9. Some lava pours out of the vent and flows from the volcano. The type of lava that looks like
ropes or the hair of Pele (the Hawaiian goddess of fire) is ____________________________ .
A thicker, cooler lava with a rougher appearance is called ____________________________.