What do these two changes have in common? mixing lettuce and salad dressing ice melting in a cup Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by heating. Both are caused by cooling.

## Step 1<br />The problem asks us to identify the commonality between two changes: mixing lettuce and salad dressing, and ice melting in a cup. <br /><br />## Step 2<br />The first change, mixing lettuce and salad dressing, involves the physical mixing of two substances. The lettuce and the salad dressing are not chemically altered or transformed into new substances. They simply mix together, which is a physical change.<br /><br />## Step 3<br />The second change, ice melting in a cup, is also a physical change. The ice is not chemically altered or transformed into a new substance. It simply changes from a solid state to a liquid state, which is a physical change.<br /><br />## Step 4<br />Therefore, the commonality between these two changes is that both are physical changes. They do not involve any chemical changes or transformations.