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30 Cards in this Set
- Front
- Back
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Air
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Takes up space
Has mass (balloons weighing down the stick) |
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The Sun
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The primary energy source that drives all weather events
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Meteorology
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The study of weather
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Meteorologists
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Scientists who study weather
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Variable Gases
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Gases that CHANGE amounts
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Permanent Gases
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Gases that DO NOT CHANGE amounts
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Pressure on a gas - Boyles Law states
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The pressure of a gas that decreases, the volume of that gas will increase (remember: experiments w/the syringe)
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Charles Law states
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When a gas is heated, the volume will increase
When a gas is cooled, the volume will decrease (balloon on the flask) |
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Seasons are caused by....
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The tilt of Earth's axis and uneven heaing (allowing certain latitudes to be heated at greater rates)
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When the N. Pole tilts towards the Sun
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Northern hemisphere has summer
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When the N. Pole tilts away from the sun
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Northern hemisphere has summer
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Earth's tilt
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23.5 degrees
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Heat transfers from...
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Warmer objects to cooler objects
From high temperatures to low temperatures |
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Convection
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The Convection Current cycle (REMEMBER....sun warming the sand diagram we worked on):
results from air near the surface being warmed then the air rises & expands - less dense then cools & contracts - more dense then sinks |
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Radiation
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Waves through space from the sun heat the ground (REMEMBER....the sun heating the sand diagram we drew)
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Conduction
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Heat transfer by direct contact (touch)
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Evaporation (when water dries up & disappears)
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Liquid changes to a gas
Molecules gain kinetic energy (speed up) Rises up into the atmosphere until it meets cool air |
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Condensation
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Gas changes to a liquid
Molecules lose kinetic energy (slow down & get close together) |
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As an object loses energy (slows down) when.......
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It changes from a gas to a liquid then to a solid
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To form clouds & fog you must have
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1. Water/water vapor
2. Condensation Nuclei 3. Temperature change |
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Hot weather
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Air expands & rises - molecules spread out
Becomes less dense Creates low pressure - usually bringing cloudy skies & wet weather |
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Cold weather
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Air contracts & sinks - molecules get close together
Becomes more dense Creates high pressure - usually bringing clear skies & sun |
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High Pressure
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Cooler Air
Calm Breezes |
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Low Pressure
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Warmer Air
Windy; more severe weather |
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Land & sea breezes form......
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Because the land heats and cools quicker than the water
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Meteorologists watch fronts and pressure systems to...
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Predict the weather
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If Earth did not tilt 23.5 degrees, then......
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Our climate would change very little throughout the year
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Land heats.....
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Quicker than water
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Warm air/liquid molecules
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Move fast
Spread apart |
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Cool air/liquid molecules
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Move slow
Get close together |
