Step 1: Prepare for the project. a) Read through this guide before you begin so you know the expectations for this project. b) If anything is not clear to you, ask your teacher for assistance. Step 2: Write your questions. a) You are familiar with some of the factors that have contributed to the rise in global temperatures over the past century. Think of three questions that will help you clarify your understanding of how these factors lead to an increase in global temperatures. Consider the following when you come up with your questions: • Ways in which natural processes and human activity have affected global temperature change over the past century • The influence of these processes and activities on a gradual or sudden change in global temperature b) Write your questions in the space provided at the end of this document. c) Have your teacher review your questions. Once they are approved, you may begin Step 3. Step 3: Conduct research. a) Search for answers to each of your questions. Be sure to support your answers with scientific evidence from reliable sources. b) The following are examples of some reliable sources you might use: • The National Oceanic and Atmospheric Administration (NOAA) • The National Aeronautics and Space Administration (NASA) • Nature magazine Step 4: Create graphs. a) Use the information in the tables below to create two-line graphs. • The first graph should show the amount of carbon dioxide in the atmosphere from 2015–2022. • The second graph should show the change in global temperature from 2015–2022. Table A. Carbon Dioxide (CO2) in the Atmospher P.S. its science