| Balancing act. |
| Weights work best below the balance point. |
| Making adjustments. |
| Scientists work together. |
| Weights make it stable. |
| Success! |
| More than one way! |
| Sometimes you only need one weight. |
| We did it! |
| Using counterweights. |
| Testing. |
| There's more than one way! |
| Balancing an arch. |
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