Question

name: date: reasoning about freedom of movement (continued) claim 3: molecules in a substance change into a new kind of molecule during a phase change. evidence this matters because... (how does this evidence support or refute the claim?) therefore,... (claim) quotation from the article:
o matter what phase water is in, the water molecules stay the same; they just move differently.\ explain why this evidence matters: describe an important observation from the sim:

Explanation:

The evidence from the article states that water molecules remain the same regardless of the phase (solid, liquid, gas), only their movement changes. A phase - change is a physical change (like melting ice to water), and in physical changes, the chemical composition (the type of molecules) of a substance does not change. So this evidence refutes the claim that molecules change into a new kind during a phase change.
For the observation from the Sim (assuming a phase - change simulation, e.g., water phase - change simulation): When ice (solid phase) melts to water (liquid phase), we can observe that the basic unit (water molecules, \(H_2O\)) remains the same. The molecules in ice are closely packed in a lattice structure, and in liquid water, they are more free - moving but still \(H_2O\) molecules.

Answer:

• This matters because: The evidence shows that during a phase change (e.g., water changing phases), the molecules do not change into a new kind. It refutes the claim as phase - change is a physical change where chemical identity (molecule type) is conserved.
• Therefore: Molecules in a substance do not change into a new kind of molecule during a phase change.
• Describe an important observation from the Sim (example): When ice melts (solid - to - liquid phase change), the molecules (still \(H_2O\)) change from a fixed lattice arrangement (in ice) to a more random, flowing arrangement (in water), but the molecule type remains unchanged.