Compare two or more objects according to their masses using appropriate uniform informal units
| 1. | Balancing Act - informal units, balancing objects | |
| 2. | Balancing Act - informal units, heavier of 2 objects | |
| 3. | Seashells By The Seashore - informal units, about the same mass | |
| 4. | Seashells By The Seashore - informal units, about the same mass |