BJU Science 6: Volcanoes (pg 14-22)

A volcano forms when __________.

• lava cools underground
• ash accumulates in the atmosphere
• tectonic plates shift away from each other
• a crack in the Earth's crust allows magma and gases to come to the surface

______ are scientists who study volcanoes.

• Seismologists

• Meteorologists
• Volcanologists
• Geologists

Match each term with its correct description.

• tephra

• body of water heated by an underground magma pool

• pyroclastic flow

• mixture of cinders, ash, and rock discharged by a volcano

• hot springs

• avalanche-like emission of red-hot dust and gases that race down the side of the volcano

• lava

• mud and rock fragments that surge down a mountain when part of it collapses

• debris flow

• magma that breaks the Earth's surface

The area around the Pacific Ocean where volcanoes occur most is called the ______.

• Fire Ring
• Belt of Ashes
• Ring of Fire
• Volcanic Zone

Tags

NGSS.MS-ESS3-2

NGSS.MS-ESS2-3

Choose ALL correct answers:

______ could cause a volcanic eruption.

• Heated magma rising to the surface

• Weather changes

• Acid rain

• A hot spot

What three shapes can volcanoes be classified as?

• composite cone volcano

• pyramid volcano

• cinder cone volcano

• shield volcano

🌋​ (a)   volcanoes have gradually sloping sides and look like upside-down saucers.

🌋​ (b)   volcanoes usually resemble a hill more than a mountain and most often have a bowl-like crater at the top with one main vent.

🌋​ (c)   volcanoes are the large, symmetrical, cone-shaped volcanoes that are commonly pictured.

• Shield
• Cinder cone
• Composite cone

🌋A volcano that has not erupted in the past and it is not expected to erupt in the future is ​ (a)   .

🌋A volcano that is expected to erupt is ​ (b)   .

🌋A volcano that has erupted in the past, is currently inactive, and is not expected to erupt again is ​ (c)   .

• dormant
• active
• extinct
• quiescent

Volcanic fog is called ______.

• smog
• Ring of Fire

• vog
• tephra

Label the parts of the volcano.

a

b

c

d

e

magma chamber

crater

lava

side vent

vent