Biogeochemical cycles The 3 basic biogeochemical cycles –W–W–W–Water cycle –N–N–N–Nitrogen cycle –C–C–C–Carbon and Oxygen cycle

Condensation Seepage Runoff Precipitation Transpiration Evaporation Root Uptake Section 3-3 The Water Cycle Go to Section:

Nitrogen cycle Bacteria in the roots of some plants captures free nitrogen in the air Bacteria in the roots of some plants captures free nitrogen in the air Organisms eat the plants Organisms eat the plants Organisms die. Nitrogen is released back into atmosphere Organisms die. Nitrogen is released back into atmosphere

N 2 in Atmosphere NH 3 NO 3 - and NO 2 - Section 3-3 The Nitrogen Cycle Go to Section:

Carbon and Oxygen cycle Two processes involve carbon and oxygen –P–P–P–Photosynthesis –C–C–C–Cellular respiration What organism requires oxygen and what does it release? What organism requires carbon (in the form of carbon dioxide) and what does it release?

CO 2 in Atmosphere CO 2 in Ocean Section 3-3 The Carbon Cycle Go to Section:

1.When does the area in which you live experience the lowest temperatures? Does the temperature ever get below freezing? 2.When does the area in which you live have the highest temperatures? About how high is the highest temperature? 3.How often does it rain where you live? Is one season rainier than the others? Does it ever snow where you live? 5.What are two factors that may affect climate? Section 4-1 Interest Grabber Go to Section:

4–1The Role of Climate A.What Is Climate? B.The Greenhouse Effect C.The Effect of Latitude on Climate Section 4-1 Section Outline Go to Section:

What affects climate? Climate in an area is affected by two main things –Direct sunlight (heat) –Precipitation Climate directly affects the type of biome –Biome is an environment with specific vegetation and organisms –If it is cold, you have organisms that are suitable to the ____

Sunlight Sunlight gives off different wavelengths When it strikes the earth, different wavelengths get reflected Some of it escapes into space, some reflects back to earth due to greenhouse gases Sunlight Some heat escapes into space Greenhouse gases trap some heat` Atmosphere Earth’s surface Greenhouse Effect

Latitude The amount of direct light can affect the temperature. Latitude are the horizontal imaginary lines on the earth that help show location Sunlight Most direct sunlight Sunlight 90°N North Pole 66.5°N 23.5°N 0° 23.5°S 66.5°S 90°S South Pole Arctic circle Tropic of Cancer Equator Tropic of Capricorn Arctic circle

Precipitation The amount of water falling in the given area can greatly affect the type of climate

Overview Sunlight and precipitation affect the climate Climate over an environment produces a biome A biome has organism suited to the climate Biomes generally occur on the same latitudes

Homework SA CH 3-3 all questions SA CH 4-1 all questions Read 4-2