Download local_wind

Things we already know
• Wind is what state of matter?
• Convection currents occur in
__________ or ____________
Other things we know
- Cold air is more
dense than warm
air
- As air is warmed
it rises
Things are heated at
different rates by
the sun!
The basics of wind
• View the website
http://www.windpower.org/en/kids/choose/
wind/index.htm
• Read for information :
Pages 536-540 in your textbook
and fill in your notes sheet
with your elbow buddy
• Winds are caused by differences
in air pressure
• Differences in air pressure are
caused by unequal heating of the
atmosphere
• Air over a heated surface
becomes less dense and rises,
cool dense air falls and causes
wind
• Wind directions is measured using a wind
vane
• Wind speed is measured using an
anemometer
• Wind-chill factor is caused because wind
removes heat as it blows over your body
• Local winds blow over short distances
• Caused by unequal heating within small
areas, near mountains or water
• Sea breeze- when the wind blows from an
ocean or lake towards the land; happens
in the day when the land warms faster
than the water
• Land breeze- happens at night when the
land cools more quickly than the water;
wind blows from the land to the water