Science Practice: Engaging in Argument from Evidence

Why does the "Whoosh Bottle" experiment behave differently at different temperatures?

The "Two-Faced" thionin reaction involves causing a purple solution to fade to colorless by shining light on the solution. I wondered if it could be demonstrated the color of light that caused this transition.

Here is a quick and easy yet powerful experiment for para and diamagnetism that helps to provide evidence for quantum numbers.

Michael Jansen reflects on a very common empirical formula lab that asks students to determine the empirical formula of Mg_xO_y. He then explains how he continues to use it as a "successful failure", how he demonstrates an alternate procedure and leads his students to an important lesson.