Volcanoes: Earth's Fiery Forces
Explore the science behind volcanoes, including their types, formation, and impact on Earth with this comprehensive worksheet for Grade 8 science.
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Volcanoes: Earth's Fiery Forces
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. What is the primary cause of volcanic eruptions?
Weather changes
Movement of tectonic plates
Ocean currents
Solar flares
2. Which type of volcano is characterized by broad, gently sloping sides and is built by layers of fluid lava flows?
Stratovolcano
Cinder cone
Shield volcano
Caldera
3. Molten rock beneath the Earth's surface is called , while molten rock that flows out onto the surface is called .
4. The "Ring of Fire" is an area in the Pacific Ocean where a large number of earthquakes and eruptions occur.
5. Describe the main differences between an explosive volcanic eruption and an effusive volcanic eruption.
6. All volcanic eruptions are destructive and harmful to the environment.
True
False
7. The Hawaiian Islands were formed by volcanic activity over a hotspot.
True
False
8. Label the parts of the volcano shown in the diagram below.
A.
B.
C.
D.
Match the term on the left with its definition on the right.
9. Lava
a. A large depression formed when a volcano collapses
10. Magma
b. Molten rock that has erupted onto the Earth's surface
11. Crater
c. Molten rock beneath the Earth's surface
12. Caldera
d. A bowl-shaped depression at the top of a volcano