Density

This week we practiced measuring volume of different objects. We measured blocks using the formula length x width x height = volume with the units in cubic centimeters. We discussed the difference between the accuracy and precision of our measurements and how to use our rulers effectively. We considered how many significant figures we could use in our calculations as well. We also reviewed how to measure volume using the displacement method with water in a graduated cylinder. There were a lot of students visiting upper school this week and we had a block schedule so it has not been a regular week. Tuesday and Wednesday during the block schedule we did a lab activity that compared the density of pennies minted before 1982 and after 1982 when they switched to mostly zinc. The Penny Density Lab gave us practice measuring volume using the displacement method, measuring mass on the electronic balance, and calculating density using our formula of Density = mass divided by volume.
We collected homework on Thursday and assigned new homework: Read chapter 2.3, pp. 53-60. Answer questions 3, 5, & 6. Due on Thursday, January 19th.