Volcanoes

Question 1

What is a volcano?

Answer 1

A volcano is an opening in the Earth’s crust through which molten rock, ash, and gases are expelled.

Question 2

True or False: All volcanoes are active.

Answer 2

False

Question 3

Fill in the blank: The molten rock that erupts from a volcano is called _____ when it is above ground.

Answer 3

lava

Question 4

What is the term for a volcano that has not erupted in a long time but may erupt again?

Answer 4

Dormant volcano

Question 5

True or False: The Ring of Fire is a region known for its high volcanic activity.

Answer 5

True

Question 6

Short Answer: What is the term for the opening at the top of a volcano?

Answer 6

Crater

Question 7

Fill in the blank: The study of volcanoes is known as _____ science.

Answer 7

volcanology

Question 8

Multiple Choice: Which of the following is NOT a volcanic hazard? A) Lava flows B) Tsunamis C) Ash fall

Answer 8

B) Tsunamis

Question 9

True or False: Volcanic ash can be harmful to aircraft engines.

Answer 9

True

Question 10

Short Answer: What is the name of the liquid rock beneath the Earth’s surface?

Answer 10

Magma

Question 11

What is the main cause of volcanic eruptions?

Answer 11

The movement of tectonic plates.

Question 12

Multiple Choice: Which volcano is known for its eruption in 1980? A) Mount Fuji B) Mount St. Helens C) Mount Vesuvius

Answer 12

B) Mount St. Helens

Question 13

What’s a pyroclast

Answer 13

A fragment that gets shot out during an explosion

Question 14

Short Answer: What is the difference between magma and lava?

Answer 14

Magma is underground; lava is above ground.

Question 15

Whats an example of a volcano

Answer 15

Mount Fuji, Japan

Question 16

Whats formed when lava cools

Answer 16

Basalt rock

Question 17

What’s an example of a plateau

Answer 17

The Antrim plateau/ giants causeway

Question 18

What’s an example of a cone shaped mountain

Answer 18

Mount st Helens

Question 19

Name three positive effects of volcanic activity

Answer 19

Economic impact: tourism, environmental: creates fertile land, environmental: geothermal heating

Question 20

Name three negative impacts of volcanic activity

Answer 20

Social: loss of life, economic: disruption in flights, environmental: Lahar

Question 21

Long answer: describe a volcanic eruption.

Answer 21

Before an eruption, magma and gases build up in the magma chamber. When the pressure gets too great, the volcano erupts through a pipe called a vent, ejecting pyroclasts. The top of the volcano can be blown off, the hole left is the crater. Eg. Mount St Helens 1980 eruption, Washington, USA.