1. Snowboarding
Snowboarding is similar to skiing and alpine skiing winter sport.
A snowboard consists of the actual planks and ties and shoes.
Snowboarding has increased considerably from the 80's onwards. It became an Olympic game in 1998.

2. Freestyle
Freestyle skiing means everything you can do whit snowboard, Which includes tricks to do with snowboard. Tricks can do in the air and on the snow. On ground tricks may for example be sliding along the barrier. Performed stunts in the air consist of the rotation.

3. Half-pipe
The half-pipe is a semi-circular ditch dug into the mountain or purpose built ramp made up of snow, with walls between 8 and 23 feet (7.0 m). Competitors perform tricks while going from one side to the other and while in the air above the sides of the pipe.

4. sources: wikipedia, google images
makers: Werneri and Joonas