What do these two changes have in common? a puddle freezing into ice on a cold night ice crystals forming on a window Select all that apply. Both conserve mass. Both are changes of state. Both are caused by heating. Both are only physical changes.

## Step 1<br />The problem presents two scenarios: a puddle freezing into ice on a cold night and ice crystals forming on a window. We are asked to identify the commonalities between these two changes.<br /><br />## Step 2<br />The first option states that both processes conserve mass. This is true because in a closed system, the total mass remains constant during a physical change. The mass of the water in the puddle or the ice crystals on the window does not change during the freezing process.<br /><br />## Step 3<br />The second option suggests that both processes are changes of state. This is also true. The puddle freezing into ice is a change from the liquid state to the solid state, and the ice crystals forming on the window is a change from the gas state to the solid state.<br /><br />## Step 4<br />The third option claims that both processes are caused by heating. This is incorrect. Both processes are caused by cooling, not heating.<br /><br />## Step 5<br />The fourth option states that both processes are only physical changes. This is true. Both processes involve a change in the state of matter, but do not involve any change in the chemical composition of the substance.