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