Which is easier to observe, physical or chemical properties? why?

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.