When water is subjected to changes in temperature, its molecular motion will increase or decrease according to the increase or decrease in temperature. Solids show the least molecular motion, liquids show more, and gases show the most molecular motion. Watch this simulation to understand what happens to water when it is subjected to increase or decrease in temperature. Follow the instructions below and answer the questions that follow. Click on the Solids, Liquids, Gases tab at the top. Under the Molecules section on the top right corner, click on Water. Then in the Heat Control box, try the following three options: Move the control to the highest point (adding heat) and hold it there for a minute. Release the control, so that it goes to 0 (neither adding nor removing heat), and observe for a minute. Move the control to the lowest point (removing heat) and only release it after the molecules are mostly gathered in an actively-moving swarm near the bottom of the container. Move the control to the lowest point once again and hold for a minute, then observe the result. Part A What happens to the water molecules when heat is added?
