Module 5

Question 1

These are openings in Earth’s crust that allows the energy from the interior of Earth to escape to the surface.

Answer 1

Volcanoes

Question 2

These are composed of molten rocks from earth’s mantle

Answer 2

Magma

Question 3

How many volcanoes in the country that were active in the last 600 years

Answer 3

20 hisorically

Question 4

These are volcano related phenomena that pose potential threat or negative impact to life, property and environment in a given period of time

Answer 4

Volcanic hazards

Question 5

This is an Indonesian term for the mixture of water, pyroclastic materials, and rock fragments flowing down a volcano or river valley.

Answer 5

Lahar

Question 6

This is also powerful enough to remove or carry away trees, boulders and logs

Answer 6

Lahar

Question 7

What year did Mt. Pinatubo erupt

Answer 7

1991

Question 8

This is composed of bits and pieces of pulverized rock, minerals and volcanic glass generated from the volcanic eruption

Answer 8

Ash fall

Question 9

This is usually spewed out from explosive eruptioms when dissolved gasses in magma expand and go out violently into the atmosphere

Answer 9

Ash fall

Question 10

What happened when atmosphere is humid and dry?

Answer 10

Ash clouds

Question 11

Most common health risks with ash fall

Answer 11

Respiratory diseases related to asthma, bronchitis and emphysema

Question 12

Health problems of animals exposed to ash fall

Answer 12

Dehydration, starvation, poisoning

Question 13

This refers to the fast moving fluidised mass of rock fragments and gases.

Answer 13

pyroclastic flow

Question 14

true or false

pyroclastic flows can easily incinerate, burn and suffocate humans and animals

Answer 14

true

Question 15

this is a rock fragment that is ejected from a volcano during its explosive eruption; it is like a cannonball

Answer 15

ballistic projectile

Question 16

When projectile or rock fragment is solid when ejected it is called a

Answer 16

block

Question 17

When projectile or rock fragment is launched in a partially molten or molten state, it is called a

Answer 17

bomb

Question 18

This consists of sulfur dioxide and hydrogen sulphide, which are poisonous and hazardous to organisms

Answer 18

volcanic gas

Question 19

these can cause acid rain

Answer 19

volcanic gas

Question 20

structures that are exposed to acid rain are prone to what?

Answer 20

corrosion

Question 21

this is a molten rock that pours down from the slopes of the volcano

Answer 21

lava flow

Question 22

this is denser and hence moves more slowly

Answer 22

lava flow

Question 23

T OR F

occurrence of tremors or increase in the frequency of small earthquakes are one of the signs of an active volcano

Answer 23

true

Question 24

T OR F

tilting or ground fissuring are not signs of an active volcano

Answer 24

false

Question 25

T OR F

landslides or rockfall not sue to heavy rains are signs of an active volcano

Answer 25

true