Use comparative language to describe mass, eg heavier, lighter, heaviest, lightest

1. Fruit Salad: Heaviest
2. Weighing Up Your Options - groups, more or less
3. Weighing Up Your Options - more or less
4. Snow Size 2 - least mass, lightest
5. Snow Size 1 - greatest mass, heaviest
6. Weighing Up Your Options: More or less
7. Weighing Up Your Options: More or less
8. Dirty Work: Lightest item
9. Dirty Work: Heaviest item
10. Tabletop Tidying - heavier of 2 objects
11. The sCat Man - lightest instrument
12. The sCat Man - heaviest instrument
13. Tabletop Tidying: Lighter of 2 objects