Chapter 1 - Hazardous Earth Flashcards
What is low and high pressure
Low is rain
High is heat
How are cells created
- Sunlight is absorbed
- Heat rises into air
- Heat moves 30° both ways from equator
What are natural causes of climate change
- Earth’s orbit (milankovitch cycle)
- Change in radiation
- Volcanic eruptions
- Large asteroid collisions
- Ocean current changes
What is the main cause of human climate change
Increasing carbon dioxide
What is the main evidence showing human climate change
- increasing global temps
- oceans warming
- rising sea levels
- extreme weather events
What are the main features of a cyclone
Low pressure
Rotating
Spherical
How do cyclones move
They start over water in the tropics and blow westward
What are the impacts of cyclones
Costal flooding and landslide
What is the method behind preparing for cyclones
Weather forecasting and satellite imagery
Name two cyclones and their effects
Katrina (USA) 2005
- Few deaths, HIC, deaths from old defences
Nargis (Myanmar) 2008
- Many deaths, LIC, deaths from poor preparation
How are earthquakes prepared for
Buildings are reinforced with stronger concrete beams
How are volcanic eruptions prepared for
Predicted via thermometers and areas evacuated
