2 Water Cycle1. Draw (or present an image) and describe the steps of the water cycle.Evaporation: Liquid-> gas (energy of sun)Transpiration: Gaseous water released from leaves of plantsCondensation: When water particles condense to form rain droplets in cloudsPrecipitation: When rain droplets fall to the earth from the clouds
3 Water Cycle (cont.) 2. Define: Evaporation and Transpiration Evaporation: Liquid-> gas (energy of sun)Transpiration: Gaseous water released from leaves of plants
4 Carbon Cycle1. Draw (or present an image) and describe the steps of the carbon cycle.Photosynthesis: The process of converting sunlight into foodRespiration: The process of converting food into carbon dioxideDecomposition: The process of flesh decomposing.
5 Carbon Cycle (cont.) 2. Describe how fossil fuels form. 3. List human activities that increase the amount of atmospheric CO2.Deforestation4. What type of a gas is CO2?Green House Gas5. What problem is associated with elevated CO2 levels?Global Warming
6 Nitrogen Cycle1. Draw (or present an image) and describe the steps of the nitrogen cycle.Nitrogen Fixation: Converting Nitrogen Gas into ammoniaDentrification: Converting nitrates into nitrogen gas
7 Nitrogen Cycle (cont.)2. What percent of the atmosphere is made of Nitrogen (N2) gas?78%3. Define and describe Nitrogen Fixation and Denitrification.Nitrogen Fixation: bacteria takes nitrogen gas -> nitrogen compoundsDentrification: Soil bacteria convert nitrates-> Nitrogen gas4. Why do all organisms require nitrogen?Nitrogen is required to make amino acids
8 Phosphorus Cycle1. Draw (or present an image) and describe the steps of the phosphorus cycle.Weathering: The process of wearing down rocks and sediments which releases phosphateSome of the phosphate is washed into the oceanSome Phosphate stays on land and is absorbed by plantsPlants bind phosphate into organic compounds
9 Phosphorus Cycle (cont.) 2. Why is phosphorus essential to living organisms?Phosphorus is required to form part of DNA3. How is the phosphorus cycle different than the other biogeochemical cycles?Phosphorus doesn’t enter the atmosphere4. Where is most of the phosphorus store In the biosphere?Most phosphorus is stored in land, rock, soil and minerals5. How does phosphorus become incorporated into organic compounds?Plants bind phosphate for organic use through a food web