University:
Texas A&M University
Course:
CHEM 119 | Fundamentals of Chemistry I
Academic year:

2019
Views:

346

Pages:

2
Author:

hacedoras1kxy

Name:________TEACHER KEY_________________Date:________________Class:__________ The Carbon and Nitrogen Cycle: What goes around comes around 1. What is the element number for carbon on the periodic table of elements? a. Carbon: ___6th____ b. Nitrogen: ___7th___ 2. True/False: Carbon and nitrogen are essential for living organisms. 3. Who were the two scientists that discovered the carbon cycle? a. Antoine Lavoisier b. Joseph Priestley 4. What are carbon and nitrogen storage pools? A carbon storage pool is an area that holds a large amount of carbon. A nitrogen storage pool is an area that holds a large amount of nitrogen. 5. What are the two forms of carbon gas that are in the atmosphere? Carbon dioxide (CO2) and methane (CH4) 6. What are the four forms of nitrogen that we see in the nitrogen cycle? Nitrogen gas (N2), ammonia (NH3), nitrites (NO2-), and nitrates (NO3-) 7. What are greenhouse gases? Greenhouse gases are gases that trap heat in the Earth’s atmosphere. 8. What are two ways that carbon is transferred from the atmosphere? What carbon pool are they transferred to? Photosynthesis (biosphere), weathering (lithosphere), and precipitation (hydrosphere) 9. What are two ways that carbon is transferred from the hydrosphere? What carbon pool are they transferred to? Diffusion (atmosphere), shellfish (biosphere), and subduction (lithosphere) Name:________TEACHER KEY_________________Date:________________Class:__________ 10. What is one way that carbon is transferred from the lithosphere? What carbon pool is it transferred to? Volcanism (atmosphere), burning fossil fuels (atmosphere), and photosynthesis (biosphere) 11. What are two ways that carbon is transferred from the biosphere? What carbon pool are they transferred to? Decomposition (lithosphere), cellular respiration (atmosphere), or ruminant digestion (atmosphere) 12. What gas product do livestock species produce as a product of digestion? Methane gas (CH4) 13. What are two ways that humans impact the carbon cycle? Deforestation, burning fossil fuels 14. What are the five major processes in the nitrogen cycle? a. Nitrogen fixation b. Ammonification c. Nitrification d. Assimilation e. Denitrification 15. What are two impacts that humans have on the nitrogen cycle? Using nitrogen based fertilizer in crops and other agriculture, sewage runoff into bodies of water, or using modern technology that creates nitrogen 16. Why has the Earth’s temperature been rising consistently over the past few decades? Human impact on the carbon cycle has increased the levels of carbon dioxide in the atmosphere, which increases the greenhouse effect by trapping more heat in the atmosphere. 17. True/False: Carbon dioxide and temperature are not related and are independent of each other.