Interactive
CK-12 Foundation

Marie Curie's Classroom

For Students 9th - 12th Standards
What makes some elements stable and others radioactive? Scholars adjust the number of protons and neutrons in an element then observe its decay. The simulation includes a graphical representation and the chemical formula, as well as...
Interactive
CK-12 Foundation

Block and Tackle

For Students 6th - 12th Standards
Can you easily lift more than your own weight? With a pulley system, almost anyone can manage this challenge. Scholars adjust the mechanical advantage (number of pulleys), weight of object being lifted, and the length of rope pulled. The...
Interactive
CK-12 Foundation

Magnifying Glass

For Students 6th - 12th Standards
How can a magnifying glass or reading glasses make things appear larger? Scholars simulate moving a lens closer or farther from an object to observe the resulting image. They also alter the lens focal length. The simulation shows the...

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