NEW
Font size
WorksheetsVolcano
Total questions: 25
Worksheet time: 13mins
Which of the following statements best describes a volcano?
A. A place within the mantle where rocks melt to generate magma.
B. It is formed underground, heated by magma, rises to the surface, and collects in a natural pond.
C. It is an opening on the surface of the planet or moon that allows material warmer than its surroundings to escape from its interior.
D. It is a long tube in the ground that connects the magma chamber to Earth’s surface.
Which of the following statements are true about volcanoes?
I. Volcanoes may undergo eruption.
II. Volcanoes exist on other planets.
III. Volcanoes are sources of geothermal energy.
IV. Volcanoes give information about inner Earth.
A. I and II
B. II and III
C. I, II, and III
D. I, II, III, and IV
What type of volcano forms from wide, thin layers of lava?
C. Shield volcano
A. Cinder cones
B. Composite volcanoes
D. Lava domes
What type of volcanoes are formed from particles and blobs of lava ejected from a single vent at the top, but they don’t get taller than around 1,000 feet?
A. Cinder cones
B. Composite volcanoes
C. Shield volcanoes
D. Lava domes
Mt. Kilauea in Hawaii is a type of volcano formed from loose, fluid lava that flows over each other. What type of volcano is it?
A. Shield volcano
B. Composite volcano
C. Cinder cone volcano
D. None of these
Which of these describes the difference between active and inactive volcanoes?
A. Materials they emit
B. The age of the volcanoes
C. The place where they are located
D. Historical record of eruptions or volcanic activity
A volcano in Hawaii was found to have erupted 10,000 years ago. Which best describes its type?
A. Active, because the supply of magma from this volcano is high.
B. Inactive, because the supply of magma from this volcano is depleted.
C. Inactive, because it has no recorded eruption for the last 10,000 years.
D. Active volcano, because it has had a recorded eruption for the last 10,000 years.
What are the primary factors that determine the explosiveness of a volcanic eruption?
A. Lava temperature and volcano height
B. Magma viscosity and gas content
C. Proximity to tectonic plates and soil type
D. Frequency of past eruptions
What are the characteristics of magma that create explosive eruptions?
A. High gas content and high viscosity
B. Low gas content and low viscosity
C. High gas content and low viscosity
D. Low gas content and high viscosity
The term viscosity refers to a liquid’s resistance to flow. The magma with the highest viscosity would have:
A. High silica content and high temperature
B. High silica content and low temperature
C. Low silica content and high temperature
D. Low silica content and low temperature
At depth in the Earth, nearly all magmas contain gas dissolved in the liquid. When do the gases form into a separate vapor phase?
A. When the volume of gas reduced as pressure is increased.
B. When the volume of gas expands when pressure is increased.
C. When pressure is decreased as magma rises toward the surface of the Earth.
D. When pressure is increased as magma rises toward the surface of the Earth.
Which of the following types of lava flow will offer the least resistance to flow?
A. Andesite
B. Basaltic
C. Rhyolitic spire
D. Rhyolitic dome
The magma in the magma chamber of a volcano has a very low amount of silica. If the volcano would erupt, which of the following might happen?
A. The lava flow is very slow.
B. The volcano would erupt violently
C. There is a build-up of pressure below the crater of the volcano.
D. The volcano would erupt non-explosively.
Which method of converting energy is used by the Geothermal plant?
A. Heat from the sun is used to generate electricity.
B. Water from the dam is used to turn the turbine to generate electricity.
C. Radiation from the radioactive substance is used to produce electricity.
D. Heat inside the Earth is used to produce steam to generate electricity.
How is heat extracted from the Earth in a geothermal power plant?
A. By burning fossil fuels
B. By drilling wells and using steam or hot water
C. By absorbing sunlight
D. By capturing wind currents
Which of the following ensures that the water that is drawn up from the production wells returns to the geothermal reservoir where it regains the thermal energy (heat) that we have used to generate electricity?
A. Injection wells
B. Rock catchers
C. Heating boilers
D. Production well
When we say geothermal energy is sustainable, we mean that:
A. There is limited supply
B. It will not be used up
C. It may cause global warming
D. It can generate solar energy
Which of the following is considered as “pros” or one of the advantages of using geothermal energy?
A. There are some minor environmental issues associated with geothermal power.
B. Geothermal power plants can in extreme cases cause earthquakes.
C. Harnessing geothermal energy does not involve any fuels, which means less cost fluctuations and stable electricity prices.
D. Very location specific (most resources are simply not cost-competitive).
What type of volcano is Mayon Volcano, which is formed from alternating layers of lava flow, undissolved stone, and ash?
A. Lava domes
B. Shield volcanoes
C. Cinder cones
D. Composite volcanoes
Mt. Akir-Akir, located in the province of North Cotabato, has no record of activity for the last 10,000 years. Which of the following statements is CORRECT?
A. It is an inactive volcano
B. It is an active volcano.
C. It is a potentially active volcano
D. It is a destructive volcano.
Taal Volcano in Batangas exhibits phreatic or hydrothermal eruption. Which of the following statements describes a phreatic eruption?
A. It is a violent eruption due to the contact between water and magma.
B. It is an excessively explosive type of eruption of gas and pyroclastic.
C. It is a periodic weak violent eruption characterized by a fountain of lava.
D. It is characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ash fall tephra.
Which of the following is a sign of an impending volcanic eruption?
A. Volcanic tremors
B. Increase level of water
C. Presence of hot spring
D. Occurrence of thunderstorm
Which serves as the driving force that causes magma to explode to the surface?
A. The gravity in the core
B. The silica in the magma
C. The dissolved gases trapped in the magma
D. The heat of the magma
What would happen if a geothermal plant extracted heat faster than it can be naturally replenished?
A. The plant would become more efficient
B. The geothermal reservoir could become depleted
C. The geothermal reservoir could become depleted
D. There would be no significant impact
What type of geothermal system is commonly used for residential heating and cooling?
A. Solar panels
B. Wind turbines
C. Ground source heat pumps
D. Hydroelectrical generator
