Students determine if heavy objects fall faster than light ones. Tennis balls with and without lead weights are dropped.

Students filling the tennis ball with lead weights.

Preparing to drop the ball.

Students timing the falling tennis ball.

Students record their data and perform calculations.

A Glowing Hydrogen spectrum tube.

Calibrating the Spectroscope.

Using a spectroscope to observe Hydrogen emission lines.

A student learns how to use his spectrum card with defraction grating to observe Hydrogen.

Spectrum Analysis

Students determine the chemical composition of an unknown glowing gas.

Photons moving to the surface of the Sun are simulated using balloons.

Time for the Mid-term exam.

Students demonstrate the principles they have learned.

Some questions are harder than others.

It was easy!