Wind Movement
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Uneven heating of Earth’s surface by the Sun causes some areas to be warmer than others
EQUATOR GETS HOTTEST AND MOST DIRECT SUNLIGHT EARTH TILTED 23 DEGREES – FLOW FROM HIGHEST OF THE POLES TO THE EQUATOR
Uneven heating of land forms…
wind systems. GLOBAL WINDS
Wind is caused by differences in..
air pressure
Areas of high pressure move to areas of…
low pressure
Air pressure is related to
density
Tightly packed particles have ____ density & pressure = ____ temperature
High density & pressure (more matter in the same volume - heat a gas = volume expands) - these increase Low temperature
Loosely packed particles have ____ density & pressure = ____ temperature
Low density & pressure (less matter in the same volume) - these decrease High temperature
Differences in density and pressure cause…
wind and air movement
The movement of air occurs in ..
convection currents
Large Convection Currents are formed because of… This produces…
temperature differences between the equator and the poles. global wind systems
The Coriolis Effect
Surface winds and surface currents are affected by the rotation of the Earth - CURVED PATTERN IS DUE TO THE ROTATION OF THE EARTH
Because Earth rotates toward the east, winds appear to curve to the ____ in the northern hemisphere and to the ____ in the southern hemisphere
RIGHT, LEFT
Global wind systems determine …
the major weather patterns for the entire planet.
Smaller wind systems affect… Two such wind systems are…
local weather. sea breezes and land breezes.
Sea Breeze - has what type of pressure on the sea and where is the wind coming from? What time of day does this occur and why?
high pressure on the sea, wind (cooler air) comes from the sea Day, the sun heats the land (low pressure) much faster than the water because water has a high specific heat
Land Breeze - has what type of pressure on the land and where is the wind coming from? What time of day does this occur and why?
high pressure on the land, wind (cooler air) comes from the land Night, the earth’s surface is NOT being heated by the sun. Land cools more rapidly than ocean water (warm water = low pressure)