What are the differences between osmosis and active transport?

Osmosis is the net movement of water molecules from an area of less negative water potential to an area of more negative water potential through a selectively permeable membrane. Pure water has a water potential of 0 kilopascals and the higher the concentration of solutes the more negative the water potential becomes. Water molecules are said to move down a water potential gradient until an equilibrium is reached. Active transport is the net movement of ions or molecules against the concentration gradient by carrier proteins or protein channels. Active transport is an active process because it requires ATP, but osmosis is passive and so requires no energy. Active transport requires ATP as an energy source as the molecules are moving against the concentration gradient, imagine walking into the wind, it will require more energy than walking with the wind