ENVR_SCI 101 1st Edition Lecture 8 Outline of Last Lecture I. AnnouncementsII. POGIL 2.3: The Nitrogen CycleOutline of Current Lecture II. AnnouncementsIII. POGIL 2.3: The Nitrogen Cycle REVIEWCurrent Lecture II. AnnouncementsA. Sandra Postel lecture September 19th @7pm @CUB Auditorium for EXTRA CREDITB. EXAM on Thursday, September 19th IN CLASSC. Study Sessions for Exam:- Friday @5pm- Tuesday @3pm- Wednesday @1pm & @5:30pm- AT FULMER 206 III. POGIL 2.3: The Nitrogen Cycle REVIEW 1. What are the primary nutrients required for plant growth?-nitrogen, phosphorus, potassium2. What are the secondary nutrients required for plant growth?-calcium, sulfur, magnesium, silicon3. What is the trace or micronutrients required for plant growth?-boron, chlorine, manganese, iron, zinc, copper, molybdenum, nickel, selenium, sodium4. Different plants have different requirements for light, water, and nutrients. If any of these requirements are not met, how could the growth of a plant be impacted?-the plant would not grow as much5. Think back to the composition of the atmosphere. What is the most abundant molecule found in the atmosphere?-nitrogen (N2)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.6. Your lungs are full of molecules from #5. Do these molecules react with your body other than to fill the space in your lungs?-no, it is for the most part inert (nonreactive)7. Consider the uses of nitrogen. How would a global increase of biologically available nitrogen influence primary productivity?-increase productivity8. Lightening fixes nitrogen to become what compound?-nitric acid9. Where do you think the oxygen and hydrogen in the compound in #8 came from?-from the water in the atmosphere10. What do cyanobacteria use as an energy source?-sunlight through photosynthesis11. When plants and animals die, what happens to their bodies?-decompose and release nitrogen to the soil12. The atoms and molecules from dead organisms do not disappear. What happens to these atoms and molecules after the process described in #11?-nitrification13. What forms of nitrogen cycle through soils?-nitrites, nitrates, ammonium14. What form of that cycled nitrogen do plants take up?-nitrates15. Which form of reactive nitrogen is toxic to plants at high levels?-nitrites16. What types of nitrogen are in the atmosphere?-NO2, N2O, N2, NH2, NO117. When an ion is released into the atmosphere, what do you suppose would happen?-will band with an atom of an opposite charge in the atmosphere to form an ion18. Aside from nonreactive N2, the other forms of nitrogen have an oxygen or hydrogen atom involved; these forms of nitrogen are reactive. Do you think they could react with water?-yes19. What happens to CO2 when mixed with water? What does it form? ______. What do you think could happen when NO2 is mixed with water?-carbonic acid; nitric acid20. If you planted a crop in a field year after year and ate the harvest, what would eventually happen to the nutrients in the soil?-nutrients would be used up21. To replenish the nutrients, what kinds of things could you do so that you could continue to grow crops?-use fertilizer or compost, crop rotation22. Before there was Miracle-Gro and other synthetic fertilizers, how did people fertilize crops?-animal manure23. When it comes to producing large volumes of cash crops, how efficient wouldyou answer to #22 be?-wouldn’t be very efficient24. Is food production in the United States limited by such constraints? If not, why?-no, because we use synthetic