American Chemical Society
Comparing the Density of an Object to the Density of Water
Investigators construct a makeshift balance and compare equal volumes of wax and water. They do the same for clay and water. Then they discover whether the wax and clay will float or sink in water. Ultimately this is a comparison of...
Scholastic
Scholastic: Dirtmeister's Science Lab: That Sinking Feeling
Simple experiments dealing with water temperature and density that you can complete in the lab and at home.
Middle School Science
Mss: Density Demonstration: Coke vs. Diet Coke
In this demonstration, students will brainstorm to find a solution as to why Diet Coke floats and Coke sinks. Through this exercise students will arrive at a definition of density.
PBS
Pbs Learning Media: Buoyancy Brainteasers: Boat in Pool Puzzler
This interactive brainteaser from the NOVA: "Voyage of Doom" Web site challenges you to figure out what happens to the water level when a rock is resting in a boat and when it is submerged in water.
University of Chicago
Center for Astrophysical Research in Antarctica: Don't Be Too Flaky
After reading some facts about the properties of water, students conduct experiments to measure the relative densities of water, ice and snow and submit the results to the website.
Science Education Resource Center at Carleton College
Serc: Mn Step: Who Is on Top?
Learners investigate density in this activity when they try to find out if oil or water has a higher density.
Wikimedia
Wikipedia: Specific Gravity
Wikipedia offers a brief explanation on what specific gravity is and why it is measured in terms of density of water. The equation for its measurement is also given.