Strong up-winds 100 km/h cause the light ice
crystals move the upper area and the hail
particles the lower area.1. Heat thunderstorms are
produced combination intense solar radiation
and moist, warm air rising rapidly great heights.
1.1 Types thunderstorm
Cold front thunderstorms develop when humid warm
air meets front cold air.1.1.1 How lightning formed
Storm fronts can occur when clouds expand to
heights 15,000 metres. Impact and friction cause
charge separation.
1.1.1.2 Charge separation
When warm, damp air rises, the moisture the air
condenses and, higher altitudes, ice crystals form.TBS
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A cold front How lightning forms negative and positive charges
A heat thunderstorm
1.
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11
Chapter General introduction
