Students observe how salt concentration increases in water and how salt remains after water evaporates. In this salty sea lesson plan, student use rock salt, water, containers, and strainers to observe that salt increases each time new...

Learners investigate how water travels up the stem of vascular plants by using food coloring to stain the xylem of a number of different plants. They know the function of leaves, stems, and root at the end of the experiment.

Third graders study how forces of push and pull can change speed or direction.