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homework_9 - Grodin Micah Homework 9 Due Nov 8 2005 11:00...

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Grodin, Micah – Homework 9 – Due: Nov 8 2005, 11:00 pm – Inst: Sara Sutcliffe 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Consider the graph of the temperature change of the earth. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 2000 2020 2040 2060 2080 2100 Year Temperature change ( C) If the average temperature of earth is 15 C in 2000, what does the NOAA model (the line in the graph) predict for the average global temperature in 2080? 1. 17.4 C 2. 15.0 C 3. 12.6 C 4. 2.4 C 002 (part 1 of 1) 10 points A solid melts. This process is 1. an exothermic chemical change. 2. an exothermic phase change. 3. neither endothermic nor exothermic. 4. an endothermic chemical change. 5. an endothermic phase change. 003 (part 1 of 1) 10 points The combustion of a certain amount of methane produces 100 kJ of energy. During this process the amount of energy in the universe 1. does not increase or decrease.
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