||- water in a gaseous state diffused in the atmosphere but below boiling temperature.
||- the cycle in which Earth's water moves through the environment.
||- the process by which a gas changed back into a liquid.
||- the process by which a liquid turns into a gas.
||- a visible collection of tiny water droplets or, at colder temperatures, ice crystals floating
in the air above the surface. Clouds come in many different sizes and shapes. Clouds can form at
ground level, which is fog, at great heights in the atmosphere, and everywhere in between. Clouds
offer important clues to understanding and forecasting the weather.
||- thin wispy clouds that form high in the atmosphere as their water vapor freezes into ice
crystals. They do not produce precipitation.
||- Fluffy, mid-level clouds that develop in towering shapes and signal fair weather.
||- Low-lying, gray and sheet like clouds that often produce drizzle.
||- the layer of air that surrounds the Earth.
||- to predict (the weather).
||- the weight of air.
||- the amount of water vapor present in a unit of volume of air. A hygroscope indicates the amount
of humidity in the air
||- the winds dependant on local changes in temperature.
||- the global winds that blow constantly from the same direction.
||- A scientist who studies and predicts the weather. Meteorologists use sophisticated equipment,
like Doppler radar and supercomputers, but they also rely on old-fashioned sky watching.
||- General name for water in any form falling from clouds. This includes rain, drizzle, hail, snow
and sleet. Although, dew, frost and fog are not considered to be precipitation.
||- The energy of the sunlight.
||- The movement of air relative to the surface of the earth. It's considered to be severe if
58 m.p.h. or greater. Hurricane winds are 74 m.p.h or greater and the highest tornado winds are
about 318 m.p.h.
||- A cloud on the ground that reduces visibility.
||- The measurement of how hot or cold something is. Thermometer - The instrument that
||- A short term climate change that occurs every two to ten years.
||- The hypothesized rise in Earth's average temperature from excess carbon dioxide.
||- process by which the Earth's atmosphere absorbs heat.
||- It describes the condition of the air at a particular time and place. Weather also tells how
the air moves (wind) and describes anything it might be carrying such as rain, snow or clouds.
Thunder, lightning, rainbows, haze and other special events are all part of weather.
||- They are intense storms with swirling winds up to 150 miles per hour. Usually around 300 miles
across, hurricanes are 1,000-5,000 times larger than tornadoes. Hurricanes are known by different
names around the world. In Japan they are Typhoons, while Australians call them Willy-Willys.
|States of Matter
*Solid - the state of matter that has a definite shape and volume - ice
*Liquid - the state of matter that has volume but takes the shape of the container - water
*Gas - the state of matter that does not have a definite shape or volume - steam
||- The average of all weather conditions through all season over a period of time. It describes
the average weather conditions in a certain place or during a certain season. Weather may change from
day to day, but climate changes only over hundreds or thousands of years. Many animals and plants
need one kind of climate to survive. Dolphins and palm trees can live only in a warm climate, while
polar bears and spruce trees need a cold climate.
||- Water that forms on objects close to the ground when its temperature falls below the dew point
of the surface air.
||- It begins as a funnel cloud with spinning columns of air that drop down from a severe
thunderstorm. When they reach the ground they become tornadoes. Tornadoes are between 300 and 2,000
feet wide and travel at speeds of 20 to 45 miles per hour. They usually only last a few minutes, but
their spinning winds, up to 300 miles per hour, can lift houses into the air and rip trees from the
||- is the area where two air masses with different temperatures and densities collide, but do not
mix. The collision often causes storms and changeable weather
||- forward edge of an advancing mass of warm air that replaces colder air, usually while causing
||- a cold air mass is replacing a warmer air mass. They generally move from northwest to
southeast. The air behind this front is noticeably colder and drier than the air ahead of it.
||- a collection of air masses, neither of which is strong enough to replace the other. On a
weather map, this is shown by an inter-playing series of blue spikes pointing one direction and red
domes pointing the other.
||- is formed during the process of cyclogenesis when a cold front overtakes a warmfront. When this
occurs, the warm air is separated from the cyclone center at the Earth's surface. In most cases
storms weaken when this occurs.
|High Pressure System
||- typically brings clear skies.