Marshmallows are for more than just dessert!
• Rubber bands (7 or 8)
• Wooden craft sticks — the wider ones work best (9)
• Plastic spoon
• Projectile objects — marshmallows or other small objects safe to sling
To create a catapult and compare projectile objects
Insert perpendicularly the seven sticks banded together through the two stick bundle. (The seven sticks serve as your base.) The closer the seven stick bundle gets to the end of the two sticks where they are banded, the more leverage the catapult will have. At this point it will look like a see-saw.
Compare the various objects you launched. Do heavy or lighter projectiles go farther? Sling large and small marshmallows. Was there a difference? A catapult uses stored energy to hurl an object. The three primary energy storage mechanisms are tension, torsion, and gravity. The catapult was a very effective weapon during ancient times.