Natural Hazards Flashcards
1
Q
How can you predict when an earthquake is about to happen?
A
- Laser beams to detect plate movement
- Increase in vibrations in the Earth’s (Measured with Seismometer)
- Sudden increase in radon gas escaping from the cracks in the Earth’s crust
- Strange animal behaviour
2
Q
How can you protect against earthquakes?
A
Constructing buildings so that they are safe, using designs to withstand movement.
3
Q
Properties of earthquake-proof buildings in MEDC’s
A
- Computer-controlled weights on roof to reduce movement
- Steel frames which can sway during earth movements
- Open areas where people can assemble if evacuated
- Foundations sunk into bedrock
- Rubber shock-absorbers to absorb earth’s tremors
- Fire-resistant building materials
- Roads to provide quick access for emergency services
4
Q
Properties of earthquake-proof buildings in LEDC’s
A
- Hollow concrete brick designed to cause minimal damage
- Reinforced cement concrete roof
- Stone foundations made from rubble from destroyed houses
- Reinforced steel corner pillars provide strength and flexibility
5
Q
How can you plan and prepare for an earthquake?
A
- Training people by holding earthquake drills and educating people via TV or radio
- Emergency kits that include aid items, blankets and tinned food
- Evacuation routes to get people out of the dangerousn areas quickly and safely
6
Q
What is a divergent plate boundary?
A
Plates are moving away from each other
7
Q
What is a convergent/destructive plate boundary?
A
Plates are moving towards each other
8
Q
What is a conservative/passive plate boundary?
A
Plates are moving past each other.
9
Q
Why are earthquakes more dangerous than volcanoes?
A
They are difficult to predict
