Hazards - Volcanoes

Question 1

Features of volcanoes - crator

Answer 1

hole at the top of volcanoes

Question 2

Features of volcanoes - magma chamber

Answer 2

large pool of molten rock found beneath the earths crust

Question 3

Features of volacnoes - vent

Answer 3

The thin, narrow pipe running down the centre of a volcano

Question 4

Location of volcanos

Answer 4

• Found along fault lines or tectonic plates and between plate boundaries

Question 5

Destructive plate boundary

Answer 5

continent and ocean plate move towards eachother

Question 6

constructive plate boundary

Answer 6

2 ocean plates move away from eachother

Question 7

How are volcanoes formed from destructive plate boundaries?

Answer 7

oceanic plate is heavier so is forced underneath the continent which generates heat causing the continent to melt. Then the melted molten rock can be forced to the surface of the earth forming a volcano

Question 8

Volcano case study - Name and when it happened

Answer 8

Mt St Helens - 18th may 1980

Question 9

causes of eruption

Answer 9

Destructive plate boundary

Question 10

Impacts on people and landscape

Answer 10

• loud blast causes noise pollution
• heat from eruption melted snow and ice released lots of litres of water
• local people evacuated from home
• 57 total deaths
• damage results in billions to rebuild
• eruption knocked out telphone lines (no way to call for help)
• mud flow choked rivers killing all life
• flights were cancelled because of poisonous gases and ash

Question 11

Methods of predicting the erutpion

Answer 11

• seismographs
• tiltmeters
• satelites

Question 12

methods of planning for the eruption

Answer 12

• evacuation plans in place
• disaster kits with first aid supplies
• education so people know hwo to protect themselves

Question 13

Aid given to manage the impact

Answer 13

• volcano sirens
• air travel suspended
• stranded people rescued
• new tourist facilities built
• compensation given to farmers
• food + water
• eruption warnings