Virginia Earth Science Volcanoes

​ (a)   are openings in the earth's surface where magma is released as lava.

​ (b)   is molten rock that is under the Earth's crust.

​ (c)   is molten rock that reaches the Earth's surface.

• Volcanoes
• Magma
• Lava

Volcanoes occur at: divergent boundaries, convergent boundaries, and ​ (a)  

Active volcanoes spew: ​ (b)   .

The ​ (c)   is the depression at the top of the cone.

The ​ (d)   is the body of the volcano.

• hot spots
• smoke, steam, ash, cinder and lava
• Crater
• Cone

Match the following

• Magma Chamber

• 
• Caldera

• 
• Vent

• 
• Neck

• 

Volcanoes are classified by their ​ (a)   type, magma type and by the shape of the cone.

​ (b)   volcanoes were named by the Icelandic people because the shape reminded them of a warriors shield lay down.

​ (c)   cone volcanoes get their name from the material that forms them, cinders.

​ (d)   volcanoes have quiet eruptions with easy flowing lava and violent eruptions with explosive tephra.

• eruption
• Shield
• Cinder
• Composite

Match the following

• Cinder volcano

• 
• Composite volcano

• 
• Shield volcano

• 

Shield volcanoes form from hot, runny lava that is erupted from the volcano through its summit and many ​ (a)   throughout the volcano's flanks ( ​ (b)   ).

Shield volcanoes are very ​ (c)   , and gently sloping and have quiet eruptions.

Shield volcanoes are considered ​ (d)   because they form at weak spots in the crust of the earth​ (e)   .

• side vents and fissures
• low and broad
• hot spots
• instead of at plate boundaries
• sides

What type of volcano is considered a Hot Spot because it forms at weak spots in the crust instead of plate boundaries

• Shield

• Cinder

• Composite

Which volcano has quiet eruptions because the runy lava that is erupted is spewed out through fissures (cracks) in the side of the volcanoes instead of all at the top.

• Shield

• Cinder

• Composite

​ (a)   volcanoes form from explosions of red, hot magma cinders and ash.

These ​ (b)   settle around the main vent and build a steep sided cone.

Very little lava is erupted from a cinder cone. Cinder cones ​ (c)   to more than 1,000ft above the surrounding landscape.

Cinder cones are known for their very ​ (d)   .

• Cinder
• cinders and ash
• very rarely rise
• violent, explosive, exciting eruptions

This volcano is known for their very violent, explosive and exciting eruptions.

• Shield

• Cinder

• Composite