What is an earthquake?
The sudden and brief period of intense ground shaking
Where magma is erupted from the earth
The movement of Earth's plates creating new land
What does vulnerability mean?
The magnitude of a volcano
The capacity to cope with, resist and recover from the impact of a hazard
The number of people who have died from natural hazards such as a volcano
What does the VEI (Volcanic Explosivity Index) measure?
The area affected by a volcanic eruption
The height and volume of the plume which is ejected from a volcano
The number of volcanic eruptions which take place each year
How many more times greater is a magnitude ten earthquake compared to a nine?
One
Ten
100
Which social factor is likely to increase the hazard threat to humans?
The size of the population
The more powerful the earthquake or volcano is
A country’s ability to train and equip its emergency services
What is an example of a physical effect associated with volcanoes?
Businesses are forced to close
A pyroclastic flow may result
People are killed or injured
What is an example of a response which helps reduce the impact of a major natural hazard?
Allow organisations into a country to try to reduce inequality and poverty
Set up evacuation zones and map the hazard
New homes are built to be earthquake-proof
What is the likely result of houses which are poorly constructed?
Increased vulnerability to a hazard
Decreased vulnerability to a hazard
No impact on vulnerability to a hazard
Which gas increases as you get nearer a volcanic eruption?
Oxygen
Sulphur dioxide
Hydrogen
When hazard mapping, which colour is often an exclusion zone?
Red
Amber
Green