geo term 2

• Synoptic charts
• The lines on the synoptic chart which join places of equal air pressure are called Isobars
•  Air pressure is measured using the unit hPa
• Air pressure can be thought of as the weight of the air on the earth's surface
• A high pressure system generally brings Low wind speeds, low chance of rain and warm temperatures
•  You can usually identify a high pressure system with widely spaced isobars that have (numerical) values of air pressure which get higher towards the cente
• A low pressure system generally brings High wind speeds, high chance of rain and cool temperatures
•  low pressure system with widely spaced isobars that have (numerical) values of air pressure which get lower towards the center
• you tell there are strong winds on a synoptic chart the isobars have low values