Sophia Learning
Sophia: Percent Difference Calculations
A tutorial screencast which illustrates how to compare an observed, calculated density to the actual density reported in reference sources. [4:27]
Massachusetts Institute of Technology
Mit: Science Out Loud: How Do Ships Float?
The technology that keeps huge cargo ships afloat is amazingly simple. PJ, a masters student in Naval Construction and Engineering at MIT, explains just how simple it really is. [3:04]
PBS
Pbs Learning Media: Hot Air Balloons
Watch kids use the scientific method to figure out why hot air can lift things. Discover how a hot air balloon works.
Next Vista for Learning
Next Vista for Learning: How to Determine Density
A video showing that density determines whether an object sinks or floats. Density is the measure of mass divided by volume. [1:28]
PBS
Pbs Teachers: Pour Air Into Water Experiment
This video segment adapted from ZOOM offers a clever demonstration of buoyancy by showing how to pour a cup of air into a cup filled with water. [1 mim, 42 sec]