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The document consists of multiple-choice questions and short answer prompts related to volcanic eruptions and their characteristics. It covers topics such as types of volcanoes, pyroclastic materials, eruption types, and the effects of volcanic activity. Additionally, it asks for awareness regarding volcanic hazards and signs of impending eruptions.

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Jo Ann Dy
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10 views1 page

I

The document consists of multiple-choice questions and short answer prompts related to volcanic eruptions and their characteristics. It covers topics such as types of volcanoes, pyroclastic materials, eruption types, and the effects of volcanic activity. Additionally, it asks for awareness regarding volcanic hazards and signs of impending eruptions.

Uploaded by

Jo Ann Dy
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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I. Read each item carefully then choose the letter of the best answer.

1. Which among the following volcanoes are formed from accumulation of lava that
oozes out from its crater?
A. Cinder coneB. Shield coneC. Composite coneD. Strombolian
2. What is the smallest pyroclastic material blown into the air during volcanic
eruption? A. Volcanic ashB. volcanic cinderC. Volcanic bombD. Volcanic dust
3. What type of volcano has a narrow base, very steep slope and rarely more than a
few hundred meters high? A. CompositeB. ShieldC. CinderD. Icelandic 4. Which of
the following characteristics of a volcano depend on its magma emission? A.
ShapeB. AgeC. SizeD. Location 5. What results when ash and cinders build up in
asteep pile around a volcano’s vent? A. cinder coneB. shield volcanoC. composite
volcanoD. inactive volcano 6. A volcano that may erupt again at some time in the
distant future is A. activeB. inactiveC. explosiveD. extinct 7. Which characteristics of
magma mainly determine its explosiveness? A. TemperatureB. ColorC. Amount of
solid particlesD. Silica Content 8. What provides the force that causes magma to
erupt to the surface? A. the silica in the magmaB. dissolved gases trapped in the
magma C. gravity in the lithosphereD. the density of the magma 9. Which of the
following volcanic eruptions is stream-driven eruption as hot rocks come in contact
with water? A. StrombolianB. VulcanianC. PhreaticD. Plinian 10. Which volcanic
eruption characterizes a Plinian eruption? A. Characterized by tall eruptions
reaching 20km high B. Excessive explosive type of eruption of gas and pyroclastics
materials. C. A periodic weak violent eruption like fountain of lava. D. A violent
eruption due to contact between water and magma. 11. What type of eruptions do
Mt. Pinatubo in Zambales shows its type of volcanic eruptions? A. PhreaticB.
PhreatomagmaticC. VulcanianD. Plinian
II. Answer the following question briefly. 1. Give at least 2 positive and 2 negative
effects of volcanic eruptions. (4 pts) 2. What are the signs of impending volcanic
eruption? Give at least 2. (2 pts) 3. What awareness can you give about volcanic
hazards before, during and after volcanic eruption? Cite 1 for each. (3 pts)
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