The Great Ocean Conveyor

Water with varying amounts of dissolved salt are dyed and then used to compare densities. The objective is to discover the effect of salinity, and therefore density, on ocean water on the stability of the ocean. Many branches of science...

In order to give young scientists experience with critical thinking skills, introduce them to a current controversy and prepare them to debate. Choose a topic, such as genetically modified organisms, and assign groups to represent...

Fourth in a set of several little lessons on density, this one compares the density of fresh and salt water. First by demonstration, and then by a hands-on activity, learners find that adding salt increases the density, as is evidenced...

Certain things just do not mix, including liquids of varying densities. Learners collect data to determine the densities of several liquids. They then use the density information to predict the type of liquid.

In this interactive tutorial students will learn about electric current, resistance and current density. Learn how current density relates to electric field strength and how resistance produces heat.

Sixth graders experiment to understand the ocean's currents.  In this ocean current activity, 6th graders complete an experiment with two bottles of water and an index card to discover information about the ocean current. ...

Students perform an experiment to measure the density of tap water vs. salt water.

Young scholars integrate history and science while discovering how salinity affects the density of water. After a lecture/demo, students work in groups to complete a lab activity that demonstrates how salinity affects the density of water.

Mass and density — aren't they the same thing? This activity has groups use balance beams and water displacement to measure several objects. The pupils use the measurements to calculate the density of the objects. 

Students experiment with different salinities of water using straws and different colors of water. They collect and interpret data from the experiment.