ࡱ> TVS'` bjbjLULU H.?.?4****lD&2^DDDD=T, &&&&&&&$'h'*n2&>>>2&DDG&>DD &> &r#T$D @r4~*j6$%]&0&D$*r|*$$6*% S2&2&&>>>>$** Ecology Webquest Ecologists: ______________________________________ Period: ___________ ______________________________________ Date: ____________ Part I: Ecosystems and Nutrient Cycling Your first assignment is to put together a simple food chain and answer the questions below. I. FOOD CHAINS Go to  HYPERLINK "http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/index.cfm" http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/index.cfm and click on play the game to begin. Answer the questions below: 1. A person is called an omnivore because theyeat meat and vegetables. 2. Food gives people and animals energy. 3. Carnivores are animals that only eat meat. 4. Herbivores are animals that only eat plants. (2) Choose the Forest Food Chain. 1. What animals (organisms) were in your food chain? Place them in the correct order. Sun ----------grass --------grasshopper -----------frog --------- snake ---------- owl. 2. What 5 things happen if you take the frog out of the food chain? 1. Grasshoppers increase because lost frog as predator 2. Grass decreases because more grasshopppers 3. If grass disappears, so will grasshoppers 4. No frogs so snakes decrease 5. Fewer snakes mean fewer owls (or move) ( II. NUTRIENT CYCLING Carbon Cycle Go to  HYPERLINK "http://www.windows.ucar.edu/tour/link=/earth/Water/co2_cycle.html" http://www.windows.ucar.edu/tour/link=/earth/Water/co2_cycle.html, read about the carbon cycle and fill in the blanks below: Name 2 places on the earth we find carbon: 1. ocean, air, rocks, soil 2. all living things(organisms) Plants pull carbon (in the form of carbon dioxide) from the atmosphere to make food, through a process called photosynthesis. Through food chains animals get carbon from the plants and other animals they eat. When plants and animals die and decay, carbon goes back into the ground. Some carbon is buried deep in the ground and forms fossil fuels When humans burn fossil fuels, carbon is released back into the atmosphere. When humans and animals exhale, they release carbon back into the air by a process called respiration. B. Nitrogen Cycle Go to the website  HYPERLINK "http://www.windows.ucar.edu/tour/link=/earth/Life/nitrogen_cycle.html&edu=mid" http://www.windows.ucar.edu/tour/link=/earth/Life/nitrogen_cycle.html&edu=mid and answer the questions below: 1. What are 2 ways nitrogen becomes useable to plants, humans and animals: Lightning strikes, fires, changed into by certain types of bacteria, by bacteria associated with bean plants 2. How do herbivores obtain the nitrogen they need? By eating autotrophs 3. How is nitrogen returned to the atmosphere? Bacteria in waterways change nitrogen that is dissolved in the water into a form that allows it to return the atmosphere 4. What are two ways humans impact the nitrogen cycle: 1. The use of nitrogen- rich fertilizers 2. Waste from livestock farming III. BIODIVERSITY Go to  HYPERLINK "http://www.nerc.ac.uk/research/issues/biodiversity/" http://www.nerc.ac.uk/research/issues/biodiversity/ and answer the following questions 1. What is biodiversity all the variety of living things plants, animals, and microbes and the places where they are found What is the estimated number of species existing on earth today 10 to 100 million species How many species have been named(a) and why may this number actually be too high(b) 1.75 million b. some species have been described more than once What is a species a group of organisms with unique characteristics that can reproduce fertile offspring What are the five main pressures on biodiversity Habitat loss Invasive species Pollution and waste Over- exploitation of renewable resources Climate change Describe three of the reasons that biodiversity is important Food Natural environments provide food Medicines of all prescription medicine come from plants Natural cycles Natural cycles rely on a huge number of species to operate effectively IV. BIOINFOMATICS Go to  HYPERLINK "http://www.ncbi.nlm.nih.gov/About" http://www.ncbi.nlm.nih.gov/About and answer the following questions Click on Primer, then Bioinfomatics. What is bioinfomatics - The transformation of Biology from a purely lab-based science to an information science as well Click on Databases and Tools, then ENTREZ, then Genome Project There are two prokaryotic kingdoms: Archae and Bacteria (Eubacteria). 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