AP Biology Reading Guide Chapter 3: Water and the Fitness of the Environment Fred and Theresa Holtzclaw Copyright ? 2010 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 3: Water and the Fitness of the Environment Concept 3.1 The polarity of water molecules results in hydrogen bonding 1. Study the water molecules at the right. On the central molecule, label oxygen (O) and hydrogen (H). 2. What is a polar molecule? Why is water considered polar? 3. Now, add + and ? signs to indicate the charged regions of each molecule. Then, indicate the hydrogen bonds. 4. Explain hydrogen bonding. How many hydrogen bonds can a single water molecule form?