Skiing or skating are two popular winter sports that involve gliding on snow or ice. Skiing is done with skis, which are long, flat pieces of wood or metal that are attached to the feet and used to slide down a snowy slope. Skating is done with skates, which are shoes with blades attached to the bottom that allow the wearer to glide across a frozen surface. Both sports require balance, coordination, and strength, and can be enjoyed by people of all ages.