Edexcel GCSE Geography - Weather and Climate Revision

Weather and Climate Revision:

• Weather - Day-to-day changes in atmospheric conditions.
• Climate - Averages of weather based on past years according to time of year and location.
• Troposphere - The section layer of the atmosphere.
• Intertropical Convergence Zone (ITCZ) - Where 2 sets of trade winds meet.

Jet Stream: Fast-flowing, meandering air currents in the upper atmosphere.

Ocean Currents:

• Caused by wind, tides, water density and gravity
• Distribute warmth across the
• Surface Currents - move the upper 10% of water
• Deep Ocean Currents - move the lower 90% of water
• Thermohaline Circulation -
  • Water on the surface of the ocean is cooled by the wind.
  • This then sinks, as cold water is denser than warmer water
  • When it sinks to the bottom of the ocean, it is heated by the Earth’s core
  • This then causes it to rise
  • This process continues constantly