Question

what do these two changes have in common? sewing an apron snowflakes forming in a cloud select all that apply. both are only physical changes. both are chemical changes. both are caused by heating. both are caused by cooling.

Explanation:

Sewing an apron is a physical change as it only changes the shape and form of the fabric without altering its chemical composition. Snow - flakes forming in a cloud is also a physical change where water vapor changes its state from gas to solid (ice crystals) without a change in chemical identity. There is no heating or cooling as a common factor for both in a direct sense, and they are not chemical changes.

Answer:

Both are only physical changes.