Learn how to take water temperature measurements at your GLOBE hydrosphere study site. This module provides a step by step introduction of the Water Temperature Protocol, using an alcohol-filled thermometer. After completing this module, you will be able to define water temperature and explain how changing environmental conditions will result in different measurements. You will learn the procedure for measuring water temperature using an alcohol-filled thermometer. You will know how to upload your data to GLOBE and be able to visualize water temperature data submitted from around the world using GLOBE’s Visualization System.