Properties of Water Webquest Name: Task 1: Water Observation Simulation Use any link below to use the Water Simulation on the PBS website. Click Launch to begin the simulation. Explore the simulation by sliding the temperature control on the upper righthand side of the screen to observe the behavior of water molecules at different temperatures. Full URL: https://www.pbslearningmedia.org/resource/arct15-sci-water/water-simulation/ Tiny URL: https://tinyurl.com/y2u9mdu6 1. Which atom in the water molecule is positively charged? Hydrogen 2. Which atom in the water molecule is negatively charged? Oxygen 3. What do you notice about the negatively charged atom of one atom in one molecule and the positively charged atom of another water atom when they touch? They stick one to another 4. Describe the movement of the water molecules at cold temperatures. The outside atoms are not moving, but the inside onesare moving a little 5. Describe the movement of the water molecules at hot temperatures. They are all moving very fast Task 2: Properties of Water Video Use any link below to watch the Properties of Water video by the Amoeba Sisters. As you watch, answer the questions below. Full URL: https://www.youtube.com/watch?v=3jwAGWky98c&vl=en Tiny URL: https://tinyurl.com/y6zgbwwt 6. Why do water molecules easily bond together? Because the hydrogen bonds it together 7. What type of chemical bond exists between two water molecules? 8. What is the difference between adhesion and cohesion? Hydrogen bond Cohesion is when the water is attracted to water, and Adhesion is when the water is attracted to other substances. 9. Describe how water moves up a tree through the xylem? Cohesion (water sticking to each other) causes more water molecules to fill the gap in the xylem and adhesion 10. Describe surface tension. Surface tension could be defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of the water molecules. 11. How does water behave when it freezes? When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%. 12. Why does water behave the way it does when it freezes? It acts like that because the water molecules slow down and get tighter together 13. What is specific heat? © Science Is Real The molecules will be further apart and move faster 14. Why is the property of specific heat important to aquatic life? Water's high specific heat allows it to absorb a large amount of heat without changing much in temperature, keeping a relatively constant temperature in oceans and lakes which is beneficial to marine life. 15. How does evaporation help cool animals and plants?Animals and plants cool off through evaporation. As these molecules leave their energy their heat is no longer on your skin all of this not just animals too plants use evaporation cooling to aid them in hot tempters Task 3: Properties of Water Article Use any link below to read the Water and Life article on the Khan Academy website. Read about the special properties of water. As you read, fill in information about each property in the spaces in the table below. Full URL: https://www.khanacademy.org/science/high-school-biology/hs-biology-foundations/hs-water-andlife/a/hs-water-and-life-review Tiny URL: https://tinyurl.com/rjp6rqk Property of Water Description of the Property 16. Water is Polar A neutral, or uncharged molecule that has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions 17. Water is an excellent solvent. Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it! 18. Water has high heat capacity. It takes a lot of energy to raise the temperature of a certain amount of water by a degree, so water helps with regulating temperature in the environment. 19. Water has a high heat of vaporization. 20. Water has cohesive and adhesive properties. Humans (and other animals that sweat) use water’s high heat of vaporization to cool off. Water is converted from its liquid form to steam when the heat of vaporization is reached. Since sweat is made mostly of water, the evaporating waterhave absorbs excess bodyforces heat, which Water molecules strong cohesive due tois released into atmosphere. This is known their ability to the form hydrogen bonds with one as another. evaporative cooling. Cohesive forces are responsible for surface tension, the tendency of a liquid’s surface to resist rupture when placed under tension or stress. Water also has adhesive properties that allow it to stick to substances other than itself. © Science Is Real 21. Water is less dense as a solid than as a liquid. As water freezes, the molecules form a crystalline structure that spaces the molecules further apart than in liquid water. This means that ice is less dense than liquid water, which is why it floats. 22. Read Common Mistakes section at the end of this article. Why can’t water dissolve oil? However, nonpolar molecules like oils lack partial positive or partial negative charges, so they are not attracted to water molecules. This is why nonpolar substances like oil remain separate when added to water. Task 4: Capillary Action Experiment Use any link to watch the Capillary Action experiment by Elearnin. After you watch, answer the questions below. Full URL: https://www.youtube.com/watch?v=w_tc8tlEoBs Tiny URL: https://tinyurl.com/jjcr985 23. What is capillary effect (capillary action)? The movement of a liquid along the surface of a solid cause by the attraction of molecules of the liquid to the molecules of the solids 24. What causes the capillary effect? Capillary action occurs because water is sticky, thanks to the forces of cohesion (water molecules like to stay close together) and adhesion (water molecules are attracted and stick to other substances). Adhesion of water to the walls of a vessel will cause an upward force on the liquid at the edges and result in a meniscus which turns upward. Task 5: Properties of Water Practice Quiz Use any link below to complete the Properties of Water practice quiz on the Quizizz website. When you have completed the quiz, write your final score below. Tiny URL: https://tinyurl.com/y28x3x5u Full URL: https://quizizz.com/join/quiz/56c50fb3917834f2504488dc/start?from=soloLinkShare 25. SCORE: * Your instructor may want you to copy and paste a screenshot of your score below. © Science Is Real Bonus Game Did you finish early? Want to play a game? Use any link below to play the Properties of Water Matching Memory Game on the Match the Memory website. Try to get your best time and beat your friends! Full URL: https://matchthememory.com/waterprop Tiny URL: https://tinyurl.com/y5dwx4qx © Science Is Real
