SCIENCE WEEK 1 3Q Flashcards

1
Q

An opening in the earth’s crust from which lava, ash, and hot gases flow or are ejected during an eruption.

A

Volcano

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2
Q

A basin-like depression over a vent at the summit of the cone and also known as the mouth of a volcano.

A

Crater

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3
Q

It is the opening through which eruption takes place.

A

Vent

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4
Q

A channel or pipe conveying liquid materials such as magma.

A

Conduit

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5
Q

Is a hot fluid or semi-fluid material below or within the earth’s crust that is usually made from molten rocks inside the earth.

A

Magma

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6
Q

The rock or magma is expelled from a volcano during an eruption

A

Lava

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7
Q

It is dependent on the plates which form the top layer on the mantle

A

Formation by subduction

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8
Q

A region of high volcanic activity not located at any plate boundary

A

Hotspot

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9
Q

it is erupting lava, releasing gas or generating seismic activity.

A

Active volcanoes

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10
Q

that are not currently active, but may be either dormant or extinct

A

Inactive volcanoes

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11
Q

It has a broad, gently sloping landform built by many layers of low-viscous lava flows which cannot be filed up into steep mounds.

A

Shield volcano

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12
Q

A type of volcano that has a steep conical hill formed above a vent that is composed mostly of basalt

A

Cinder cone volcano

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13
Q

-Is one constructed of alternating layers of pyroclastic materials and solidified lava flows.
-with high silica content

A

Composite volcano

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14
Q

It is a volcanic crater that is formed when a part of the wall of the crater collapses following an explosive eruption

A

Caldera

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15
Q

-it is a stream-driven eruption as the hot rocks come in contact with water

A

Hydrothermal

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16
Q

IT IS A VIOLENT ERUPTION DUE TO THE CONTACT BETWEEN WATER AND MAGMA RESULTING IN A VIOLENT FINE ASH ERUPTION

A

Phreatomagnetic

17
Q

It is a period of weak to violent eruption characterized by fountain lava.

A

Strombolian

18
Q

It is characterized by a tall eruption that reaches up to 20km high with pyroclastic flow and ashfall tephra

A

Volcanian eruption

19
Q

It is an excessively explosive type of eruption of gas and pyroclastics.

A

Plinian