Question

what do these two changes have in common? water evaporating from a puddle dew appearing on grass in the morning select all that apply. both are changes of state. both are chemical changes. both are caused by heating. both are caused by cooling.

Explanation:

Water evaporating from a puddle is a physical change where liquid water turns to water - vapor (change of state from liquid to gas). Dew appearing on grass in the morning is also a physical change where water - vapor in the air condenses to form liquid water (change of state from gas to liquid). These are not chemical changes as no new substances are formed. Evaporation is caused by heating (absorbing heat energy), while condensation (dew formation) is caused by cooling (losing heat energy). But the commonality is that they are both changes of state.

Answer:

Both are changes of state.