In this science learning exercise, high schoolers use the diatoms present in water in order to test water quality and perform data collection and interpretation.

See the water filtration system up close with a fun science experiment. Young scientists work for several class periods to design a water filter using household objects, and then decide which filter material would be most effective...

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. 

In this online interactive English vocabulary skills worksheet, learners answer 10 matching questions which require them to fill in the blanks in 10 sentences. Students may submit their answers to be scored.