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 Earth’s
tilt and revolution cause changes in
seasons
 Tropics of Cancer and Capricorn mark points
furthest north and south that the sun’s rays
shine directly overhead at noon
 This day is called the solstice (summer and
winter)
 Equinox: days and nights all over the world
are equal in length (spring and fall)
 Weather:
condition of atmosphere at a
particular location and time
 Climate: conditions over a long period of
time (Georgia has a temperate climate)
 Precipitation
 Cloud
(water vapor)
cover
 Landforms and bodies of water (water heats
and cools slowly, land quickly)
 Elevation (higher elevations have thinner air
and cannot hold moisture)
 Air movement
Wind: distributes the sun’s heat through
convection (transfer of heat by upward motion
of air)
 Ocean currents: warm currents flow away from
the equator and toward the poles, cold flows
back to equator, they also move heat throughout
the globe
 Latitudes: low(tropical) always hot, middle
(varies), high (polar) always cold
 Elevation: temperature drops about 3.5 degrees
F for every 1000 feet
 Topography: cool winds on windward side, dry
and warmer on leeward side

 El
Nino: natural change in climate off west
coast of South America, easterly winds
change direction, warm water and heavy
rains push toward Americas, drought in Asia
and Australia
 La Nina: warm water blows toward Pacific
Rim, precipitation in India, dryness in
Americas
 Can you guess which one we are currently
experiencing?
 Ecosystem:
community of plants and animals
 Biome: specific region
 Forests: broadleaf (deciduous) trees/rain
forest, needle leaf (coniferous) cone
bearing/pine
 Grasslands: flat, few trees, tropical savanna,
Northern Hemisphere has steppe/prairie
 Desert and tundra: extreme dry or cold
climates