3. Define: A phase change is a change from one state to another, such as from a liquid to a gas. Based on what you have read in the Gizmo, fill in the blanks with the words 'liquid," "gas," or 'solid' to define each change.
4. Practice: Fill in the process that causes each transition. Your choices are evaporation, condensation. precipitation, melting, and freezing.
5. Practice: Fill in the two processes that cause each of the following transitions
6. Think and discuss: Water covers over two-thirds of Earth's surface. Yet water shortages are a major problem for many people around the world. Why do you think this is the case?
