Density Notes: How do we learn about things we can’t interact with? Measuring Stuff: Length: Meter (m) Volume: Liter (L) = 1dm³ Mass: Gram (g) = 1dm³ = 1mL Time: Second (s) Amount of Stuff: Mole (mol) Temperature: Kelvin = *C + 273.15= K LAB Fill Graduated Cylinder With Water (500mL) Bismuth Weight 78g Add bismuth to water Measure water change (9mL) Calculate Density 78g/8mL = 9.75g/mL Checked Density 9.78g/mL | Secondary Measurements: Ratios + Comparisons Velocity: Distance/Time = d/t = m/s Molarity: mol/L Density: Mass/Volume = S/cm³ ⬇ Buoyancy: The comparison of densities between two substances. LAB Density of Air: .001225g/mL Balloon Diameter : 22cm Balloon Radius : 11cm Mass/Volume➨5575.28cm³ Air : 6.83g |
We tested the density of bismuth, and a balloon. I think the science in the bismuth and the cylinder was pretty simple. The bismuth takes up space. So if we were to put it into the cylinder with water, the water would rise because the bismuth is taking up space. With the balloon, I think was really cool. The helium inside the balloon is more dense than the air outside, causing it to float. But when we add the tape to the helium and the balloon, they have the same density as the air around it, making it float in one place. This was a guided lab so it was mostly Andrew, but the people observing were Sammy, Alex, Natalie, Garrett, and I. If I could do this again, I would use a different item, other than bismuth. I would also want to work with people I don't normally work with. Some people I had in mind were, Noah, Annika, and Lupe.