Properties of Water Station Instructions .pptx

Properties of water

1. Station 1: Pennies and Water Question 1: How many drops of water did fit on the head of a penny? - Use a pipet to slowly drop water onto a penny counting each drop. - Repeat this procedure using water that contains soap. - Thoroughly rinse and dry the penny before moving to the next station.

2. Station 2: Water and Milk - Pour enough whole milk in the petri dish to cover the entire surface about 1/4 inch deep. - Add one drop of each different colored food dye to each quadrant of milk in the petri dish, careful not to mix the dye. Place drops close to the center of the dish. - With a single toothpick, add a small amount of detergent into the center of the petri dish containing milk. Hold the toothpick still and wait to see what happens. - Dispose of toothpicks, then rinse and dry the dish.

3. Station 3: Density and Surface Tension - Fill a plastic container with water - Place a small square (~2 in x 2 in) of aluminum foil on the surface of the water. Does it float? - Press the square down into the water. Does it float? - Take the square of the water and crumple it into a ball. Place it back in the water. Does it float? - Throw away the foil. Part 2: The Paper Clip Challenge Balance a paperclip on the surface of water using tweezers. (Hint: Don’t let your fingers touch the water!). Touch the paper clip once it is balanced. What happens

4. Station 4: DIY Lava Lamp - Fill the 50 ml centrifuge tube ⅔ full with vegetable oil. - Fill the container the rest of the way with tap water. - Add a few drops of food coloring (choose your color!) - Drop half of an alka seltzer tablet into the jar. Enjoy! - Place the jar in the disposal container for cleaning later.

5. Station 5: Density of Water - Fill the plastic container halfway with tap water. - Uncap a warm (red) test tube and a cold (blue) test tube. Use your finger to prevent leakage as you submerge both into the plastic container. - Remove fingers to observe the movement of warm and cold water in the container. - Empty plastic container for the next group.

6. Station 6 - Solvents - In one beaker, pour ~20 ml of water. In a second beaker, pour ~20 ml of rubbing alcohol. - Place about a teaspoon of salt in each beaker. Swirl the beakers. In which did the salt dissolve? - Empty beakers and repeat the experiment to test whether sugar dissolves in water or alcohol.