Geography Paper 1- Hazardous Earth

Earth's Structure:

Inner Core- Solid, Very Hot, Iron+ Nickel

Outer Core- Liquid, Very Hot, Iron + Nickel

Mantle- Semi-Molten Rock(Magma), Hard at Top, Soft at Bottom near Core

Crust- Where we Live, Continental Crust= Carries Land, Less Dense, Oceanic Crust= Carries Water+ Dense

Global Circulation:

Natural Climate Change (Natural Hydrometeorological):

1. Milankovitch Cycle- Orbit Change within every 100 000 years

2. Volcanic Erruptions- Ash= Cool

3. Asteroid Collision= Block Sun= Nuclear Cooling Effect

4. Asteroid Hits= Fire= CO2= Warm

Mnemonic: MAVA

Evidence:

1. Tree Rings- Narrow= Cool, Wide= Warm

2. Ice= CO2 Trapped

Humans+ Climate Change:

CO2 Released into the Atmosphere due to Human Acticity Causes Global Warming due to Excess Greenhouse Gases which Reflects Shortwavelength Radiation Back to Earth= Warm

1. Farming- Machines

2. Fossil Fuels

3. Industries

4. Transport

5. Deforestation

Mnemonic: FIT Farmer Dave

Evidence of Global Warming:

1. Rising of Sea Levels

2. Melting Ice Sheets

3. CO2 Rising

Tropical Cyclones:

Formation:

1. Sea= More Powerful as they are…