The crew adds one straw across each square side.
Now every side has two triangles.
Rocket sets the ball on top very gently.
Nova counts. "Eight, nine, ten! Still standing."
Raven checks the ruler. "The ball is seven inches up. Goal met!"
| Version | Shape of sides | Ball height (inches) | Held 10 seconds? |
|---|---|---|---|
| Rocket version 1 | Squares | 7 | No |
| Rocket version 2 | Triangles | 7 | Yes |
Version 2 is the same height as version 1.
It used four more straws, one across each side.
That used all twelve straws, so it follows the rules.
And this time it held the ball for ten seconds.
| Idea | True or false? |
|---|---|
| Version 2 was taller than version 1. | ? |
| Version 2 used all 12 straws. | ? |
| Triangles helped the frame hold the ball. | ? |
| Version | Ball height (inches) | Held 10 seconds? |
|---|---|---|
| Your version 1 | ||
| Your version 2 |
Version 1 used 8 straws: 4 legs and 4 on top.
Version 2 added 4 more, one across each side.
8 and 4 more make 12.
That is exactly the limit.
| Result | True or false? |
|---|---|
| Version 2 held the ball for ten seconds. | ? |
| The crew changed the ball for version 2. | ? |
| Version 2 met the whole goal. | ? |
You used a strong shape to solve a problem!
Tomorrow is Build Day.