Post on 02-Jan-2016
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CHAPTER 4 SECTION 1SC-B-6.2
STUDENTS WILL EXPLAIN HOW POPULATIONS ARE AFFECTED BY LIMITING FACTORS(INCLUDING DENSITY-DEPENDENT, DENSITY-
INDEPENDENT, ABIOTIC,& BIOTIC FACTORS
The Role of Climate
What is Climate?
the average, year-after-year conditions of temperature & precipitation in a particular region.
[weather is the day-to-day condition of Earth’s atmosphere @a particular time & place]
What causes climate?
caused by interplay of several things but the 2 most important factors are:
TemperaturePrecipitation
other factors: latitude amt heat trapped in atmosphere transport of heat by winds, ocean currents topography of the land
The Greenhouse Effect
CO2, methane, H2 O (g), + few other gases trap heat nrg from sunlight & maintain Earth’s temperature range w/out the greenhouse effectEarth’s average temp
would be ~-19 ◦C!
http://earthguide.ucsd.edu/earthguide/diagrams/greenhouse
/
Effect of Latitude on Climate
because Earth is a sphere & tilted solar nrg strikes different parts of the Earth’s surface @ angles that vary thru out the yr
Climate Zones
as result of differences in latitude & so the angle of heating, Earth has 3 main climate zones:
1.tropical2. temperate3. polar
Heat Transport in the Biosphere
un= heating of earth’s surface drives winds & ocean currents
both transport heat thru out the biosphere because warm masses of air or water rise & colder masses sink