Global hazards

• What are the four parts of the earth?

  crust, mantle, outer core, inner core
• What is the focus of today's recap video?

  Hazardous weather section of global hazards
• Why is the global circulation system important?

  It impacts global hazards and ecosystems
• What are the three main cells in the global circulation system?

  • Hadley cell
  • Ferrel cell
  • Polar cell
• What happens to warm air at the equator?

  It rises, cools, and condenses into clouds
• What is the result of air rising at the equator?

  It leads to lots of rainfall
• What type of pressure is created at the equator?

  Low pressure
• How does air movement affect weather patterns at 30 degrees latitude?

  Cool air sinks, creating dry conditions
• What type of climate is found around 30 degrees latitude?

  Dry conditions and deserts
• What happens to moisture as air sinks at 30 degrees latitude?

  Moisture is lost through evaporation
• What are the general weather conditions in the Ferrel cell?

  • Dry conditions at the bottom
  • Wetter conditions in between
  • Low pressure at the top
• What is the climate like at the poles?

  Cold and very dry
• Why are polar regions classified as deserts?

  They receive very little precipitation
• How does cloud cover affect temperature at the equator?

  Clouds block heat, keeping it cooler
• What is the temperature difference between deserts and rainforests?

  Deserts can reach up to 50 degrees
• What are the key differences in weather between the UK and Australia?

  • Higher temperatures in Australia
  • More precipitation in the UK
  • Stronger winds in Australia
• What should you consider when comparing weather conditions in two countries?

  Location and pressure systems
• What is the significance of extreme precipitation in different places?

  It can lead to floods or droughts
• What is the maximum rainfall recorded in the Cherrapunji region?

  Up to 1000 millimeters a month
• What causes the extreme dryness in the Atacama Desert?

  Air sinks and dries out
• What are El Niño and La Niña phenomena?

  • El Niño: Disruption of normal weather patterns
  • La Niña: More extreme normal conditions
• How do trade winds affect ocean temperatures during El Niño?

  They weaken, causing warmer waters
• What weather conditions are associated with El Niño in Australia?

  Increased rainfall and thunderstorms
• What happens to weather patterns in South America during El Niño?

  Increased rainfall and flooding
• What is the impact of La Niña on Australia?

  Stronger storms and more evaporation
• How does La Niña affect South America?

  It leads to more extreme droughts
• What tasks should students complete this week regarding hazardous weather?

  • Complete the exam question
  • Take the hazardous weather quiz
  • Create revision materials
• What should students do if they have questions?

  They should email the instructor