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Flashcards in Tectonic Hazards Deck (22)
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1

Constructive boundary

A constructive plate boundary, occurs when oceanic plates move apart

2

Destructive plate boundary

An destructive plate is where oceanic and continental plates move together

3

Conservative plate boundary

A conservative plate boundary occurs where plates slide past each other in opposite directions. Pressure builds up,the plate breaks and produces an earthquake

4

Collision plate boundary

Collision zones occur when two continental plates collide. The plates are too light too sink so both are forced up and form mountains

5

How do you measure an earthquake

The richter scale

6

Case study Earthquake: Haiti

Location: Haiti. Small island in the Caribbean

Causes:
North American plate sliding past the Caribbean plate at a conservative plate margin. The pressure built up by friction was eventually released causing a magnitude of 7 in the Richter scale

Effects: Social
* 230,000 people were killed
* 1 million people homeless

Economic
*Total damages have reached and estimated total of 7 billion

Environmental
* Uprooted trees
*destruction of farmland

7

Ways to reduce earthquake impacts

Earthquake proof buildings that can withstand the force of an earthquake

Have earthquake drills in areas that are prone to earthquakes. This can help reduce death injuries during earthquakes

8

Factors that affect impacts of earthquakes

Distance from epicenter:
The epicenter is the point in the earths surface directly above the focus. The focus is where the earthquakes begins. The further away the impact is less severe

9

Dangers of living near a volcano

Eruption of volcano

10

Why people choose to live near volcanoes

Mineral rich soils which is ideal for farming
Volcanoes attract millions of people which create many jobs
Geothermal energy used to produce electricity

11

Case study: Krakatoa Volcano

Eruption: 1883
Location: Indonesia
Effects: Social
36,000 deaths

Economic
500 million total damage

Environmental
Uprooted trees
Destruction of farmland

12

What is a supervolcano

An unusually large volcano having the potential to produce an eruption with major effects on the global climate

13

How earthquakes occur

Earthquakes happen when two large pieces of the earths crust slip. This causes shock waves to shake the Earth and form into an earthquake

14

Hurricane recipe

Precursor storms + Warm air + Low wind Shear

15

At what temperature does the water need to be so that a hurricane occurs

27+

16

In order to call it a hurricane it has to go at what speed

74mph +

17

The hurricanes in Northern Hemisphere turn in which direction

Clock wise

18

The hurricanes in the Southern Hemisphere turn what direction

Anti clock wise

19

Impacts of hurricane Katrina

Social
1300 deaths
2260 people stayed in shelters

Economic
75 billion dollars worth of damage

Environmental
Widespread flooding

20

Tornado recipe

Low warm air + high cold air= Wind shear

Wind Shear + Warm moist conditions = thunderstorms

21

Impacts of tornadoes

Social
Destruction of homes= Homeless
Deaths
Lack of safe water

Economic
40 million pounds worth of damage in Birmingham= They could’ve spent it on education
Damage to tourism

Environmental
Trees were ripped up

22

What is a drought

A deficiency of water over an extended time period, usually at least a season