A balloon A straw A piece of string 3 to 5 meters long that passes easily through a drinking straw, e.g., linen thread or butcher’s twine Adhesive tape (e.g., masking tape) Scissors When you inflated ...

For example, Jupiter is the most massive planet in our solar system. It’s so big, it could swallow 1,000 Earths. So it requires a very high escape speed: 133,100 mph (about 214,000 kilometers per hour ...

which is jet engine rocket-propelled. The children discover that the cars with two balloons work the best, but could the two balloons be arranged in a different way so that even more of the stored ...