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CARBON CYCLE Go to Click and complete scene 1. Name 2 places on the earth we find carbon:Go to about the carbon cycle and fill in the blanks below:Plants pull carbon (in the form of carbon dioxide) from the atmosphere to make food, through a process called ____________________.Through food chains animals get ____________ from the plants and other animals they eat.When plants and animals die and ____________, carbon goes back into the ground.Some carbon is buried deep in the ground and forms ________________________.When humans burn fossil fuels, ________________ is released back into the atmosphere.When humans and animals exhale, they release carbon back into the air by a process called ______________________________. How are oceans involved in the carbon cycle? ________________________________________ ______________________________________________________________________________How is the temperature of the Earth partly controlled by carbon? ________________________ ______________________________________________________________________________What role do rocks have within the carbon cycle? _____________________________________ ______________________________________________________________________________How are humans altering the carbon cycle? __________________________________________ ______________________________________________________________________________Use this site to play a carbon game: Click to begin your journey. Where you begin the carbon cycle? ________________________________________________What stops do you make? _______________________________________________________ How much of the atmosphere is made of carbon dioxide? ______________________________By how much has CO2 increased in the atmosphere during the past 150 years? _____________The deep ocean accounts for more than ______% of the Earth’s carbon.How much carbon does the surface ocean absorb from the atmosphere each year? _________When plants die and decay, they bring carbon into soil. TRUE or FALSE (Circle one)Plants both absorb CO2 from the atmosphere and release it into the atmosphere. TRUE or FALSE (Circle one)Phytoplankton are tiny plants and algae that float in the ocean and take up carbon dioxide as they grow. TRUE or FALSE (Circle one)When carbon enters the deep ocean, how long does it stay there? ______________________NITROGEN CYCLEGo to the website: the questions below:3152775-2540For what three things do plants and animals need nitrogen?______________________________________________________________________________What are 2 ways nitrogen becomes useable to plants, humans and animals?____________________________________________________How do herbivores obtain the nitrogen they need? _________________________________How is nitrogen returned to the atmosphere? _______________________________________What are two ways humans impact the nitrogen cycle:________________________________________________________________________________________________________What happens when there is an excess of nitrogen? __________________________________Like carbon, nitrogen must be recycled continuously. Go to the following websites to learn how this happens: is most nitrogen in the biosphere located? _____________________________________This nitrogen is not in a useable form. Plants and animals cannot simply absorb nitrogen from the atmosphere. Therefore, it must be _____________________, which means ________________________________.What are two ways that nitrogen can be removed from the atmosphere: ________________________________________________________________________________________________________What happens to nitrogen inside of a plant? _________________________________________How does the nitrogen get to carnivores? ____________________________________________What happens to the nitrogen when organisms die? ___________________________________What is the name of the process that returns nitrogen to the atmosphere? _________________Go to the following site the website to give the process names of the steps of the nitrogen cycle described below. Process NameProcess DescriptionConversion of atmospheric nitrogen into ammonia by either lightning or nitrogen fixing bacteria in the roots of legumes. N2NH3Conversion of ammonia (NH3) into nitrite (NO2) then into nitrate (NO3) by nitrifying bacteria. NH3NO2NO3-Nitrates (inorganic nitrogen) are uptaken by the roots of plants and incorporated into proteins. Nitrogen is now part of the food chain! NO3- Organic Nitrogen Conversion of organic nitrogen from dead plants and animals into ammonia by decomposers (bacteria and fungus) Organic Nitrogen NH3Nitrates are returned to the atmosphere by anaerobic denitrifying bacteria. NO3 N2 ................
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