2 What is the structure of water? Water is a compound that contains two hydrogen atoms (+) and one oxygen atom (-). Due to the electrical charges water is known as a polar molecule. Chemical formula is H2O.Looks like Mickey Mouse.
3 Turn and TalkYou will partner with your neighbor. When I say go, partner A will discuss his/her understanding of the question while partner B listens. When I call time, partner B will share his/her understanding of the question and partner A will listen.Topic:Why does ice float?How does ice floating in water relate to the properties of water?What property of water is being discussed? How would our world be different without this property?
4 What are the unique properties of water? Universal SolventCapillary ActionAdhesionBuoyancySurface TensionPolarityCohesionDensity
5 How is water a universal solvent? Answer: Water has the ability to dissolve most substances.Definition:Universal Solvent: Water’s unique property to dissolve most substances.Teacher Guided Lab: “Water, the Universal Solvent”Real-World Examples:Salt and water - Instant pancake mixKool-aid - Alka-seltzerQuestion (copy): How would our lives be different if water could not dissolve most substances?Frayer Model: Think-Pair-Share
6 Is water polar or nonpolar? Answer: Water is a polar molecule. It contains a positive and negative charge.Definition:Water’s property to have an even distribution of charge across the molecule.Background Info:Polar molecule mix with polar molecule. (saltwater)Polar and nonpolar do not mix. ( oil and water)Nonpolar mix with nonpolar. (milk and chocolatesyrup)Teacher Guided Lab: “Polar Pals”Quesion (Copy): How would our food look different if water was not a polar molecule?Frayer Model: Think-Pair-Shar
7 Why do belly flops hurt?Answer: When entering a swimming pool your body is breaking the water’s surface tension.Definition:The force that acts on the particles in water that allow it to become tight.Background Info:The force that allows water to become tight is cohesion.Cohesion: The attractive force between water molecules.Teacher Guided Lab: Sinkin’ LincolnQuestion: How would the landscape of Earth be different if water molecules did not have cohesion and vaporized at room temperature?Frayer Models: (Surface Tension, Cohesion) Think-Pair-Share
8 How do cruise ships float if they are so big? Answer: Cruise ships are able to float because of the upward force of buoyancy and the boats shape.Definition:- Buoyancy: The ability of a water to exert an upward force on an object that is immersed.Background Info.:Density of water is 1.0 g/mlSalt and depth increase buoyantforce.Real-World Examples:Salt Lake UtahIce floating in waterTeacher Guided Lab: “Passengers in a Boat”Question: Why can anyone float in theGreat Salt Lake in Utah?Frayer Model: Think-Pair- Share
9 Bowling ball. Sink or float? Why? Answer: A bowling ball would sink in water because it is more dense than the water.Definition:Density: The measure of mass of a substance in a given volume.Background Info.:Density of water= 1.0 g/mlTeacher Guided Lab: “A Density Column”Frayer Model: Think-Pair-Share
10 How do plant roots get their water from the soil? Answer: Plants roots rely on water’s property of capillary action.Definition:Capillary Action: The process that moves water through a narrow porous space.Real-World Ex.Water and celery stick (picture)Roots and soil waterPaper towel and spillsTeacher Guided Lab:- Capillary ActionFrayer Model: Think-Pair -Share
11 Why does a suction cup stick better when you put water on it? Answer: Suction cups use water’s property of adhesion to stick to surfaces better.Definition:Adhesion: The tendency of water to stick to other substances.Real-World Examples:Suction cup on a windowRain on a rain jacketTeacher Guided Lab: Go with the FlowFrayer Model: Adhesion