Water Olympics Lab: Properties of Water

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1 Name Period Ms. Pfeil A# II. Training and Measurement: Each group will examine some unique properties of water and answer questions. Do each Training and Measurement once as a group. A. Solubility Test: Can all substances dissolve in water? Why or Why not? 1. Prepare two containers of water by adding 25 ml of tap water. 2. Measure 5g of substance 1 (sand) in the first cup, stir, and observe. 3. Measure 5g of substance 2 (sugar) in the second cup, stir, and observe. 4. Record your data in the table. Substance Observations after mixing substances with water 1 2 B. ph Testing: What causes a liquid to be an acid or a base? 1. Take a piece of litmus paper and place in the container of water, observe, then record observations. 2. Take a piece of litmus paper and place in the container of vinegar, observe, then record observations. 3. Record both qualitative data in a table. 4. Test the ph of the other five common household liquids. Vinegar Observations: Water Observations: Observations of litmus paper Product Name Color & ph number C. Water in Tubes: What type of attractions or forces are causing the water to move upward in a tiny tube like this? 1. Observe a straw or glass tube in the beaker with colored water. 2. Carefully observe where the water level is inside the tube. 3. Record and sketch. Sketch of the tube with water level label and forces identified. **Start reading the directions for Water Olympics G: Water Slalom. Make your hypothesis while you are waiting so when you rotate to this lab station, you will be able to start preparing the lab right away.

2 III. Water Olympic Events: Assign Each Group Member a Letter and Keep a Record of Each Member s Measurements D. Water Pole Vaulting: What properties keeps the water from spilling over at the rim? & 1. Fill one cup for each team member as full of water as possible. 2. Make a hypothesis about how many pennies you can put in the cup without it overflowing. 3. My hypothesis is: If you place pennies in a cup then it will take drops before it overflows. 4. Place pennies one at a time in the cup. Observe for overflow. 5. When the cup overflows, record the number of pennies it took to overflow. Pole Vaulting Results E. The Water Balance Beam: What property of water helps form a droplet? 1. Make a hypothesis of how many drops a penny can hold on top of it before one falls off. 2. Record your hypothesis number in your data table. 3. My hypothesis is: If you place drops on a penny then it will hold drops before overflow. 4. Place one drop of water a penny, one at a time, until one falls off. 5. Record the number of drops one penny would hold in your data table. Balance Beam Results F. Paperclip Backstroke: What property of water will float a paperclip? 1. Caution: This part takes patience and a steady hand! 2. Make a hypothesis of how many tries it will take to float a paper clip on top of water. 3. My hypothesis is. Write this number in the chart below. 4. Balance a paper clip on the very ends of a fork prong. Place it in a pool of water and attempt to float the paperclip. Each time you start to lower the fork in the water equals one attempt in floating the paperclip. 5. Record the number of attempts it took you to actually float a paperclip. Backstroke Results

3 G. Water Slalom: What property of water causes a paper towel to soak up the water? 1. Each group member hangs one of the brands of paper towels. 2. Each group member chooses which brand you think will finish 1 st, 2 nd, and 3 rd. 3. Record your hypothesis on the order of finish. My hypothesis on order of finish is. 4. Place a line across all 3 paper towels in the same location. 5. Tape one end of the every towel onto a plastic ruler provided and lay across the ring stand. 6. When all team members have their strip in place then lower the ends opposite of the mark in water, barely touching the surface of the water, it will begin to rise through the towel. (In order to race, all strips must touch the water at the same time.) 7. Record your observations on which strip worked the fastest etc. You are to hypothesize on the race. Which brand do you think will rise the fastest? Make sure to start them all at the same exact time. Water Slalom Results Hypothesis Order Actual Order # correct

4 HOMEWORK BEGINS HERE Name Period Ms. Pfeil A# Post Lab Research Question: Use the Water Olympics Lab, your textbook on pages 40-43, or other resources to answer. The Research Question: Does water have properties that are important to living things? Your Claim (Complete sentence) (+1pt): Your Evidences: (Properties of Water) List 2 (+2 pts) Justification: Specific example explaining how each evidence listed to the left is important to a living thing. (+4 pts) Post Lab Questions: 1. What does a liquid with more H+ ions than water produce? a. ph above 7 b. base c. alkaline d. acid 2. What is the SI measurement unit for mass? a. ml (milliliter) b. g (gram) c. cm (centimeter) d. Celsius 3. What properties of water caused the water to rise in the straw? a. solubility b. surface tension c. capillary action d. all of these 4. What property of water would allow a spider to walk on top of it? a. cohesion b. adhesion c. capillary action d. surface tension 7. What causes water to be pulled up paper towels? a. adhesion b. cohesion c. capillary action d. all of these 8. A unique property of water that causes it to form droplets is? a. cohesion b. adhesion c. capillary action d. surface tension

5 Post Lab Total Points: 30 Your Points: Open Response: Number and list five properties of water. (+5 pts) Briefly explain each property of water you listed. (+5 pts) Explain how each property is important to living things. (+5 pts)

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