topic 1- tectonic hazards

Natural hazard

An extreme event that causes loss of life, severe damage to property or severe disruption to human activities

Social

To do with people

Environmental

To do with the relationship between humans and the natural world

Economic

How well a country is doing in making goods and money

Give three reasons why a natural hazard would have the most impact on an LIC

• more poor quality housing and healthcare

• Poor infrastructure means its harder to reach affected people

• Less money to protect people (eg earthquake proof buildings) and less money for responses (e.g. providing food)

What do convection currents do?

Cause plates on the mantle of the earth to move

Convection currents explained

1. Magma below the surface is heated by the core and rides to the crust where it cools and sinks to be reheated again

2. Friction caused by the rising currents means that the plates are pulled forward or dragged back (plate tectonics)

The two types of crustal plates

Oceanic & continental

Oceanic plates

Denser & thinner

Continental

Less dense and thicker

The three plate boundaries

Constructive, conservative and destructive

Destructive margins