SCIENCE 101 > GIZMOS > Student Exploration Carbon Cycle Part B C/ Student Exploration: Carbon Cycle Part B & C (All)

Student Exploration Carbon Cycle Part B C/ Student Exploration: Carbon Cycle Part B & C

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Student Exploration: Carbon Cycle Part B & C Introduction: Fossil fuels, such as coal, oil, and natural gas, formed over millions of years from the remains of ancient plants and animals. The burning of fossil fuels, as well as other human activities, increases the amount of carbon dioxide in the atmosphere. Question: How does human activity affect the carbon cycle? 1. Describe: Using the Gizmo, determine how coal and petroleum (oil) are formed. Describe the steps required to form each fuel from atmospheric CO2. Coal: Land plants use atmosphere CO2 plant material is pressed and heated and transformed into coal. Petroleum: Ocean to atmosphere to marine plants to marine animals to sediment. 2. Explore: Natural gas is a mixture of methane (CH4), ethane (C2H6), and other gases. Find two ways that natural gas forms. List the steps of the two carbon pathways below: Path 1: ocean to marine plants to sediment to natural gas Path 2: land plants to natural gas How is the formation of natural gas related to the formation of coal and petroleum? Both start from the atmosphere 3. Describe: Fossil fuels are used in many ways. Using the Gizmo, describe the main use for each fuel. Coal: Fossil fuel carbon Petroleum: Page 1 of 5 This study source was downloaded by 100000810073548 from CourseHero.com on 04-14-2022 12:29:35 GMT -05:00 https://www.coursehero.com/file/73657332/-Student-Exploration-Carbon-Cycle-Part-B-C/Student Exploration: Carbon Cycle Part B & C Extracted from wells Natural gas: Explosives In each case, what is the end product of burning the fossil fuel, and where does it go? CO2 to the atmosphere 4. Explore: Another major contribution to atmospheric carbon dioxide is the cement industry. Using the Gizmo, find a carbon atom path from the atmosphere to the cement plant. (Hint: One of the ingredients in cement is limestone.) Path: ocean, corals, limestone, cement How is carbon dioxide produced in a cement plant? Limestone is heated releasing it into the atmosphere 5. Analyze: Click Reset, then navigate to the Land animals. Select Atmospheric CH4. A. How do land animals create methane? Bacteria break down in the guts to produce methane B. Humans raise large numbers of cattle for food. How will these herds of cows affect Earth’s atmosphere? Increase CO2 in the atmosphere 6. Analyze: In many tropical rainforests, people clear land by cutting down trees and burning them. After a few years, the soil runs out of nutrients and cannot be farmed any longer. How does this practice of “slash and burn agriculture” affect Earth’s atmosphere? It increases CO2 because burning wood produces carbon dioxide

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