Ep.19: Building Bridges

What keeps building from toppling over in the wind? Why are some earthquake-proof and others not? We’re going to look at how engineers design buildings and bridges while making our own.

Can you build a bridge using only popsicle sticks and hot glue that can carry a bottle of water? (For smaller kids, use a smaller water bottle.) The only limitation is that you may not glue the bridge to the table. I will use masking tape to attach the end of the bridge to the table if needed only after they build the bridge and are ready for testing.

Materials

  • Popsicle sticks (big box)
  •  Hot glue guns and glue sticks
  •  Bottle of water (empty at first)
  •  Two tables parallel to each other, spaced 3 to 4 feet apart
  •  Optional: 5 feet of string
  •  Optional: Scale for measuring weight of water in the bottle

Download the student worksheet that goes with this lesson.

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Ep.18: Secret Codes & Ciphers

Cryptography is the writing and decoding of secret messages, called ciphers. Now for governments these secret ciphers are a matter of national security. They hire special cryptanalysts who work on these ciphers using cryptanalysis. The secret is, solving substitution ciphers ...Read More

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