Water’s Characteristics Day 7

NB setup date Water WU: EQ: 4Qs Notes Summary 41 Penny Lab Question: How many drops of tap water and soapy water can a penny hold? Predict # : Tap water ____Soapy water ____ Hypothesis (If…then…) Experiment: … Data: Graph: Analyze: (2+ sentences) Conclusion: (3+ sentences) 40 date Water WU: EQ: 4Qs Notes Summary 41 Trial 1 Trial 2 Trial 3 Aver. Tap Soapy

Warm-up: Page 41 What molecule is this? Why is it important for life?

Water EQ: Describe the important characteristics of water. NBpg. 41 Water 1 of 2 Page 8 EQ: Describe the important characteristics of water. Within the molecule the atoms are shared in Covalent Bonds. H2O is neutral Hydrogen Bonds are the attraction of the H and O between several water molecules. The Oxygen is slightly negative, The Hydrogen is slightly positive. (Q1) (Q2) sketch

NBpg. 41 Water 2 of 2 Page 8 Adhesion is the attraction between molecules of different substances. EX: water moving on plants Cohesion is an attraction between molecules of the same substance. EX: rain drops Surface Tension is the cohesion at the surface of water, which forms a surface "film/skin.” Some substances may reduce the cohesive force, which will reduce the strength of the surface. (Q3) (Q4) Summary

NBpg 40: PENNY LAB Include these words in your explanations: adhesion, cohesion, surface tension, volume, surface area Question: How many drops of water can a penny hold with tap water and soapy water? Predict # : Tap water ____ Soapy water ____ Hypothesis (If…then…) Experiment: Do 3 trials for tap and soapy water. Count how many droplets of water fit on a penny. Data: Graph: Create a graph based on the data, and remember TAILS Analyze: (2+ sentences) Does tap or soapy water have more surface tension? Conclusion:(+3 sentences) Restate your Hypothesis, was it accepted or rejected. Explain why, by summarizing the data. Trial 1 Trial 2 Trial 3 Aver. Tap Soapy