All sea planes, for example, have to ski for take-off and landing. So what is the point of the question?
You might be thinking of professional skiing. As in the Olympics, Freestyle skiing is a discipline which contains a: Mogul event Areial event Ski-cross event So really, mogul skiing is a type of freestyle skiing.
It is actually an alpine skiing event. It is combining downhill skiing with navigation with Slalom Courses. It is one of the most intense skiing contests.
Nordic skiing
Your probably talking about this...http://www.youtube.com/watch?v=B7hkRW8MCJUIts basicly skiing with a parachute so you can go off huge cliffs and fly away.
Slalom.
alpine skiing
'downhill'While it may seem obvious that all skiing would be downhill, nevertheless there is a sporting race in skiing that is specifically called 'downhill' skiing, or the 'downhill' event. This race has very few turns, as opposed to the skiing 'slalom' event, which is also downhill, but has a zigzag course with many turns.
Downhill skiing is the fastest as you can ski up to 100mph! The second fastest is Super Giant Slalom (Super G), which is basically straight down almost.
no nc is ski jumping and cross country skiing
whistler blackcomb
Alpine skiing uses gates.
slalom