NATURAL PHENOMENA

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SNOW Snow is formed when ice crystals collide and stick together As the particles increase in size and weight, even bigger ice crystals called snowflakes are formed It is related to the entire life cycle of water that is from liquid state through solid and finally back to vapor Air temperature doesn’t have to be below freezing (0°C) for it to snow The heaviest snow fall tends to occur when the temperature of the air is between 0-2°C. If the temperature is > 2°C then the snowflake will begin to melt and fall as sleet instead – warmer still, and the precipitation turns into rain
Type of tornado Supercell A supercell is large long-lived thunderstorm. It can produce some of the largest and most violent tornadoes. Waterspout A waterspout forms over water. They usually dissipate when they hit land. Landspout A landspout is similar to a waterspout, but on land. It is weak and is not associated with a vortex of air from a thunderstorm. Gustnado A small tornado formed at a weather front by gusts of wind. Multiple vortex A tornado with more than one spinning tube of air. TORNADO Characteristics - Violent windstorm - Twisting - Funnel shaped cloud - Cool air overrides a layer of warm air - Derived from spanish word “tomar” = to turn How it happen A large thunderstorm occurs in a cumulonimbus cloud A change in wind direction and wind speed at high altitudes causes the air to swirl horizontally Rising air from the ground pushes up on the swirling air and tips it over The funnel of swirling air begins to suck up more warm air from the ground The funnel grows longer and stretches toward the ground When the funnel touches the ground it becomes a tornado
Page 1: Natural Phenomena Group J Tan Ee Li
Page 5: A lunar eclipse occurs when the Moo

NATURAL PHENOMENA

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