Investigate Day and Night
On Earth, night follows day and day follows night. But why?
Complete this fun investigation to find out!
Measure Mountains on the Moon
Measure the Speed of Light
Make Your Own Spectroscope
Spectroscopy involves splitting light into its different wavelengths. Each chemical element emits or absorbs a unique spectrum&n
Why Do Shadows Change Over Time?
Have you noticed that your shadow changes over time? The cartoon on this page shows why shadows change during the day.