MLS: Strand 1.1.I.4th.a Observe that the total mass of a material remains constant whether it is together, in parts, or in a different state. Directions: 1. Weigh the LEGO brick as one unit. Take a and write down the weight on page 2. 2. Take apart the LEGO brick into many pieces. Take a and write down the weight on page 3. 3. Explain on page 4 what this proves.