Volcanic Eruption

Question 1

Is a vent on the earth’s surface that opens downward to a pool of molten rock, debris, and gases.

Answer 1

volcano

Question 2

takes place when two plate converge.

Answer 2

subduction

Question 3

is the place where the two plates converge and the volcano is formed

Answer 3

subduction zone

Question 4

Is currently erupting or is showing signs of volcanic eruption. It should have also erupted within the last 600 years.

Answer 4

active volcano

Question 5

Is one which has erupted and then entered a long period of inactivity.

Answer 5

potentially active volcano

Question 6

Is one that has not shown any sign of activity for a long period. It has no record of volcanic eruption in the past thousand years.

Answer 6

inactive volcano

Question 7

is a mass of magma that flows down the slope of the volcano at a rate of 3 kilometers per day (slightly high viscosity) or 45 kilometers per hour (low viscosity).

Answer 7

lava flow

Question 8

refers to hot dry masses of fragmented volcanic materials that move along the slope and in contact with ground surface at a speed greater than 60 kilometers per hour.

Answer 8

pyroclastic flow

Question 9

are turbulent low-concentration density currents of gases, rock debris and in some cases, water, that move above the ground surface at high velocities.

Answer 9

pyroclastic surges

Question 10

are showers of fine coarse-grained volcanic materials and other airborne products of a volcanic eruption.

Answer 10

tephra falls

Question 11

are rocks that are released into the air by an erupting volcano.

Answer 11

ballistic projectiles

Question 12

is one of the basic component of magma or lava.

Answer 12

volcanic gas

Question 13

is flowing mixture of volcanic debris and water.

Answer 13

lahar

Question 14

PHIVOLCS meaning

Answer 14

Philippine Institute of Volcanology and Seismology

Question 15

Example of potentially active volcano

Answer 15

Mt. Pinatubo

Question 16

Example of inactive volcano

Answer 16

Mt. Cabalian