Rainbow Salt: An Investigation in Density
Materials:
Scales/Balance
1 - 100 mL Graduated Cylinder
2 - 150 mL Beakers
Pipette
Sheet of background paper, white
Kosher salt
Food coloring and water
Scales/Balance
1 - 100 mL Graduated Cylinder
2 - 150 mL Beakers
Pipette
Sheet of background paper, white
Kosher salt
Food coloring and water
In this experiment, we had to make layers of water to make a rainbow. We first filled up both of our beakers to 60 mL, and filled them with the first masses of salt (16 and 11.7). We then added food coloring (blue and green respectively) to the two. Carefully, we poured 20 mL into the graduated cylinder using a pipette. After the blue solution was poured, we used a pipette to pour 20 mL of the green solution slowly into the graduated cylinder, being cautious to not let the two solutions mix. After both solutions were inside, we poured out the blue and green solutions and made the yellow, orange, and red solutions, repeating the same process until all of them made a rainbow.
Conclusion
1. The water formed different layers because the cohesion and surface tension caused the water to form layers. As we slowly dropped each of the solutions in, the water molecules stuck together, but the bonds in on the surface of the previous layer did not break.
2. The saltiest layers would be found in the bottom of the ocean because
3. The density of water becomes less dense as temperature increases, or becomes denser if temperature decreases.
4. I would expect to find warmer, fresher water at the top as the sun is shining down on the top, and cold, saltier water at the bottom of the ocean, as the sun's rays is unable to extend to the bottom of the ocean.
2. The saltiest layers would be found in the bottom of the ocean because
3. The density of water becomes less dense as temperature increases, or becomes denser if temperature decreases.
4. I would expect to find warmer, fresher water at the top as the sun is shining down on the top, and cold, saltier water at the bottom of the ocean, as the sun's rays is unable to extend to the bottom of the ocean.