volcano

Question 1

is an opening in the earth’s crust through which lava, volcanic ash, and gases escape.

Answer 1

volcano

Question 2

molten rock is slowly being forced through the cracks or weaknesses on earth.

Answer 2

magma

Question 3

When the magma is outside the volcano, it is called

Answer 3

lava

Question 4

is the one that has a tendency to erupt or is already erupting

Answer 4

Active volcano

Question 5

A volcano that is not erupting or is not going to erupt sometime in the near future.

Answer 5

Dormant volcano

Question 6

have not erupted in the last 30 000 - 40 000 years, and are not expected to erupt anytime.

Answer 6

Extinct volcanoes

Question 7

is generally low and has a dome shape

Answer 7

shield volcano

Question 8

type of volcano is considered to to be the simplest type. These volcanoes are the result of eruption from a single vent.

Answer 8

cinder cone

Question 9

happen due to the buildup of thick magma with high silica content.

Answer 9

Explosive eruptions

Question 9

The most common type of volcano is the

Answer 9

stratovolcano or composite volcano.

Question 10

emits a lot of lava coming from a fissure or a crack on the surface.

Answer 10

quiet eruption or fissure eruption

Question 11

A chain of volcanoes is called an

Answer 11

arc

Question 12

the agency that serves as the arm of the government that studies, records, and gives forecasts about the behavior of the active volcanoes, which helps in mitigating the effects of volcanic eruption.

Answer 12

Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Question 13

is the downward movement of surface materials caused by gravity.

Answer 13

Mass movement

Question 13

Geological hazards can also be grouped into

Answer 13

sudden and slow phenomena

Question 14

These are the force of gravity acting on a material

Answer 14

driving force

Question 15

The force acting on the material and the friction holding it in place

Answer 15

resisting force

Question 16

occur in steep or nearly vertical mountainous areas where rocks are loosened by weathering.

Answer 16

Rockfalls

Question 17

is a project aimed at providing and conducting hazard mapping and assessment In effective community-based disaster risk management

Answer 17

Project Ready

Question 18

The right amount of water would provide the proper surface tension between loose soil grains; this is called

Answer 18

cohesion

Question 19

occurs when water saturates the ground, making soil and rock materials heavier and causing them to move downslope as a fluid-like mass

Answer 19

Flow

Question 20

Flow occurs when water saturates the ground, making soil and rock materials heavier and causing them to move downslope as a fluid-like mass. This movement is called

Answer 20

debris flow or mudflow

Question 21

are fast-moving landslides made of rocks, soil, and mud that rush down slopes with great force, causing severe destruction and loss of life.

Answer 21

Debris avalanches

Question 22

is known as the Father of Soil Mechanics

Answer 22

Karl von Terzaghi

Question 23

is a downslope movement of soil or rock

Answer 23

slide

Question 24

Moves along a curved, concave- upward surface

Answer 24

Rotational Slide (Slump)

Question 25

Moves along a surface parallel to the slope

Answer 25

Translational Slide

Question 26

is a slow downslope movement of soil and weak rocks

Answer 26

Creep

Question 27

A very deadly downslope movement of snow

Answer 27

Avalanche

Question 28

are hazardous movements of the Earth’s surface that often happen because of human activities and natural processes underground.

Answer 28

Ground subsidence and collapse

Question 29

is the slow sinking or lowering of the ground.

Answer 29

Subsidence

Question 30

is the sudden sinking or opening of the ground.

Answer 30

Collapse

Question 31

commonly develop in areas with limestone bedrock, which can dissolve in slightly acidic groundwater

Answer 31

Sinkholes

Question 32

Three main types of sinkhole formation

Answer 32

dissolution, cover subsidence, cover collapse

Question 33

happens when thin soil allows water to dissolve limestone, forming shallow depressions

Answer 33

DISSOLUTION

Question 33

Occurs when sandy soil slowly settles into underground cavities.

Answer 33

Cover Subsidence

Question 33

Happens suddenly when thick clay soil covers large underground cavities, making it the most dangerous type.

Answer 33

Cover collapse

Question 34

or mass wasting, are the downslope movement of rock, debris, and soil primarily under the direct influence of gravity

Answer 34

Mass movements