Volcanoes and Earthquakes Flashcards Preview

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Flashcards in Volcanoes and Earthquakes Deck (16):
1

Where the volcanoes are found?

At destructive and constructive plate margins.

2

Volcano at destructive plate margin

The magma rises trough cracks in the crust called vents.

3

Volcano at constructive plate margin

The magma rises up into the gap.

4

When the earthquakes occur?

At all three types of plate margin.

5

Earthquakes

Caused by tension that builds up at all three types of plate margin. Destructive-plate gets stuck. Constructive-along cracks within the plates. Conservative-plates grind and get stuck. This causes vibrations.

6

Focus of earthquake

The shock waves spread out from the focus. The point in the earth where the earthquake starts.

7

The epicenter

is the point on the Earth's surface, straight above the focus.

8

Magnitude scale

Earthquakes are measured by the magnitude scale.

9

Primary effects of earthquakes

Immediate impacts of the ground shaking.
-buildings and bridges collapses
-people injured, killed by buildings
-roads, railways, ports, airports are damaged
-electricity cables, gas, water pipes are damaged

10

Secondary effects of earthquakes

Happen later on, as a result of the primary effects.
-triggers landslides, tsunamis
-leaking gas, starting fire
-homeless people could die
-shortage of clean water, lack of sanitation
-unemployment, lost of tourists
-repairs, reconstruction-very expensive

11

Immediate responses to earthquakes

Have to be dealt imminently to stop further loss of life
-rescue trapped people
-recover dead bodies to prevent spread of diseases
-set temporary shelter
-provide water, food and medical treatment

12

Long-term responses to earthquakes

Dealt with the longer term.
-re-house people
-reconstruct, repair buildings
-reconnect broken communications
-improve the resistance of buildings
-economic recovery(promoting tourism)

13

Primary effects of volcano

-buildings and roads are destroyed by lava
-people injured or killed
-crops are damaged and water is contaminated
-people and animals are suffocated by volcanic gases

14

Secondary effects of volcano

-mud flows, when volcanic material mixes with water
-flooding, hot rocks melt ice or snow
-lack of tourism
-people are homeless
-recovery after eruption takes a long time, money

15

Immediate responses to volacno

-evacuate people before eruption
-provide food, drink, shelter
-treat injured people
-rescue people

16

Long-term responses to volacano

-rebuild, resettle affected buildings
-repair and reconnect infrastructure
-improve monitoring and evacuation plans
-boosting the economy