Air pressure: Anti-cyclones (highs) and Depressions (lows)

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Presentation transcript:

Air pressure: Anti-cyclones (highs) and Depressions (lows)

Aims To know and understand the main features of an anti-cyclone and depression To know and understand the weather conditions associated with anti-cyclones and depressions

Starter Complete the crossword on everything you have studied so far on weather and climate

Anti-cyclones An anti-cyclone occurs because of changes in the air pressure. Areas with above average pressure (high pressure) are called anti-cyclones and they usually bring good weather. Cool air is sinking so there is few clouds – in the summer this means hot sunny weather and in the winter is brings fog and frost

Depressions Depressions bring with them clouds and rain They develop where warm air meets cold air The boundary where they meet is called a front Depressions are areas of low pressure Depressions usually from over the Atlantic Ocean and move from west to east

Depressions Click on the red labels find out more!

Task Using the Foundations Textbook pages 24-27 complete activity sheets 2.5 and 2.6