Why does some ink bleed through paper, and other ink doesn't? Practice some paper chromatography to separate the colors from a pen with an interactive experiment for middle and high schoolers. Learners use a variety of solutions to track...

Students predict the measurement of objects. In this measurement lesson, students estimate the measurements of objects in a lab. Students measure irregular objects and generate scientific observations.

Students observe osmosis, a cellular process that normally can't be observed without a microscope, and use scientific method to observe osmosis in a chicken egg.

Students identify chromatography as method of separating the components of a liquid. Students discover that dyes are composed of more than one component in achieving a particular color in these lessons on paper chromatography.

Tenth graders discuss marine mammal diving reflex, and measure pulse rate while holding their breath under three conditions: control, warm water, and ice water to determine if humans exhibit marine mammal diving reflex.

Learners critically analyze data regarding climate changes using a glossary of terms generated by examination of climate related articles. They examine and graph climatic data, and discuss, hypothesize and test apparent discrepancies in...