Order it up applet
https://www.windows2universe.org/games/order_planets_intro.html

UCAR-Windows to the Universe

Does any planet have a stronger magnetic field than Mars? Which planets have a greater mass than Jupiter? Which are denser? Which are larger? Users can find out while playing the Solar System Edition of Order It Up! Order it Up measures of size and scale help us understand the magnitude of objects. Once you get the planetary bodies in order, you can unscramble a space photograph.

This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you have information we can use to flesh out or correct this record let us know.

Part of the Starting Point collection. The Starting Point collection includes resources addressing the needs of faculty and graduate students designing, developing, and delivering entry-level undergraduate courses in geoscience.

This resource is referenced here:

• Starting Point-Teaching Entry Level Geoscience:Interactive Lectures:Examples: Order It Up!

Subject: Geoscience:Lunar and Planetary Science
Grade Level: Middle (6-8), College Lower (13-14), High School (9-12)
Theme: Teach the Earth:Course Topics:Planetary Science