Warm Up #54/26 1.Could a carbon atom in an ancient plant stem become part of a plant today? 2.How? 3.Are fossil fuels part of the carbon cycle? 4.How are.

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Presentation transcript:

Warm Up #54/26 1.Could a carbon atom in an ancient plant stem become part of a plant today? 2.How? 3.Are fossil fuels part of the carbon cycle? 4.How are fossil fuels made? 5.TRUE/FALSE: When organisms use cellular respiration to break down foods, SOME of the energy moves into the environment

Agenda4/25 GRADES BACK (Remind me ~10 min till end) Go over results/purpose of lab Nitrogen cycle notes Begin project online (critical partners) Re-takes of quiz—come in today!!! (phone calls tomorrow!)

Lab overview What did we do? Why did we do it What where we trying to find out? What did we find out

Nitrogen Cycle Animation _share/vis_sim/em05_pg20_nitrogen/em05_ pg20_nitrogen.swf _share/vis_sim/em05_pg20_nitrogen/em05_ pg20_nitrogen.swf

CH 8 Notes #6 Nitrogen Cycle Process of nitrogen moving from the environment into organisms and back Importance: Nitrogen is used to make nucleic acids & proteins

Remember… Proteins make our traits They give our bodies structure Carry Oxygen through the bloodstream Send signals through our bodies Makeup part of the cell membrane

A trip through the nitrogen cycle A.Nitrogen fixation: process where bacteria turn nitrogen gas into a form of nitrogen other organisms can use Note: 80 % of the atmosphere is nitrogen gas but most organisms cannot use it until it has been changed

B. Lightning also adds nitrogen to the soil when it strikes the ground

C. Plants absorb nitrogen through their roots and use it to build proteins

D. Animals eat the plants (or other animals) and use the nitrogen in plant proteins to make their own proteins

E. Decomposers break-down dead organisms putting nitrogen back into the earth or atmosphere where it can be used again

Remember: As nitrogen cycles through the atmosphere, soil, and living things the total amount of nitrogen in the ecosystem does not change Note: This is true for all matter, including carbon!

Other important points Reminder: CHNOPS; the six most common elements in living things. Fertilizers add phosphorus and nitrogen to the soil, which helps plants grow -Note: fertilizer is not plant “food”, it’s more like plant “vitamins” Phosphorus is another important element in living things that is also needed, especially by plants