OCR B: Global Hazards: Weather Hazards

What is high pressure?

• When air sinks, this air is usually dry

• When air sinks, this air is usually wet

• When air rises, this air is usually dry

• When air rises, this air is usually wet

What is low pressure?

• When air sinks, this air is usually dry

• When air sinks, this air is usually wet

• When air rises, this air is usually dry

• When air rises, this air is usually wet

Bands of high pressure cause what type of climate/biome?

• Desert

• Tropical

• Temperate

• Savannah

Bands of low pressure cause what type of climate/biome?

• Desert

• Tropical

• Temperate

• Savannah

Which cell of the global circulation system starts when air rises at the equator?

• Hadley

• Ferrel

• Polar

Which cell of the global circulation system circulates the opposite way to the other 2 cells?

• Hadley

• Ferrel

• Polar

Which cell of the global circulation system starts when cold air sinks at 90 degrees N or S?

• Hadley

• Ferrel

• Polar

Select all of the following that are correct.

• Al-Aziziyah in Libya is the hottest place on Earth where the air temperature reached a record breaking 57.8°C

• Commonwealth Bay in Antarctica is the windiest place on Earth with winds often over 240km/h (149m/h)

• Aswan in Egypt has a rainfall of only 0.861mm per year, this is mostly due to its latitude

• The UK is the wettest country in Europe as a result of the prevailing winds coming off of the Atlantic Ocean and our latitude putting us in a low pressure zone

Define drought.

• A time where the area is very dry for a number of possible factors

• Where there is less that a metre of rain throughout the year

• A period when there is much less precipitation (rain) over a specific time than is usual for an area, leading to water shortages

• When the ground in the area cracks as a result of minimal rainfall

Define tropical storm.

• A hurricane, cyclone or typhoon depending which ocean the storm comes off from

• Where winds exceed over 154/mph along with excessive rainfall

• A powerful, rotating storm in the tropics (also know as a cyclone, hurricane or typhoon)

• Where the sea temperature is over 27 degrees, the latitude is between 5-30 degrees N or S of the equator and the water is over 60m deep