Describe how a physical property such as mass and texture, can change without causing a change in the substance

Which characteristics can be used to differentiate star systems? check all that apply.

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)