Unit 1A - Tectonic Hazards - Plates, volcanoes and earthquakes

Question 1

Natural Hazard definition?

Answer 1

Any natural event that has potential to endanger people, economy and property.

Question 2

Two main types of natural hazards and differences?

Answer 2

Geological - caused by land and tectonic processes

Meteorological - caused by weather and climate

Question 3

3 factors affecting hazard risk?

Answer 3

Vulnerability, capacity to cope and nature of natural hazard

Question 4

Difference between primary and secondary effects of earthquake?

Answer 4

Primary - direct result of ground shaking

Secondary - result of primary

Question 5

What happens at destructive plate boundary?

Answer 5

Plates move towards each other and oceanic plate subducted under continental plate, leading to friction causing earthquake. As it subducts, it melts and magma rises through vents.

Question 6

What happens at constructive plate boundary?

Answer 6

Plates move apart and magma from mantle rises through gap, leading to earthquake and volcano eruption or formation when cools

Question 7

What happens at conservative plate boundary? Example of fault?

Answer 7

Plates slide past each other and get stuck. When pressure is released an earthquake occurs.
San Andreas fault

Question 8

What can be created from destructive plate boundaries? How?

Answer 8

Fold mountains - continental is crumpled

Question 9

Two islands that have been created from constructive?

Answer 9

Hawaii and Iceland

Question 10

Which is denser, oceanic or continental crust?

Answer 10

Oceanic

Question 11

What causes plates to move?

Answer 11

Convection currents

Question 12

Where do earthquakes take place?

Answer 12

At any plate boundary and anywhere

Question 13

At what two plate boundaries do volcanoes occur?

Answer 13

Destructive and Constructive