Global Hazards

Question 1

What causes differences in Air pressure

Answer 1

Different temperatures cause movement of air, the equator is warmer than N/S pole, causes differences in air pressure

Question 2

What are global atmospheric circulation cells made up of?

Answer 2

Cool sinking air which forms high pressure and warm rising air causing low pressure

Question 3

What are the names of the 3 global atmospheric circulation cells?

Answer 3

Hadley, Ferrel and Polar cells

Question 4

What are trade winds?

Answer 4

Surface winds that blow towards the equator

Question 5

What is the weather like in high pressure areas?

Answer 5

There is minimal rainfall and no clouds

Question 6

What is the weather like at low pressure areas?

Answer 6

Lots of clouds and rainy

Question 7

What are the 4 global climate zones?

Answer 7

Polar, temperate, arid, tropical

Question 8

How are tropical storms formed?

Answer 8

Form over water that is 26.5 degrees or warmer, causes air to evaporate and rise, creates low pressure which increases trade winds and Coriolis Effect

Question 9

What is the Coriolis Effect?

Answer 9

It is the deflection of winds caused by the earths rotation that helps storms to spin

Question 10

What is La Nina?

Answer 10

It is when air and water currents strengthen, causing ocean to be pushed further to Australia creating flooding and extreme rainfall and draughts in the East

Question 11

What is El Nino?

Answer 11

When currents and trade winds weaken or change directions leading to less rainfall and draught in Australia and more flooding and rainfall in the East