Many injuries that occur in extreme sports involve the breaking of bones. Follow the link to the video about the human skeleton. Then find an image of a human skeleton and do some research so you can identify and label the bones in the arms and the legs.
Watch the following video on The Science of Mountain Climbing, and then summarise what you have watched and learnt. https://www.youtube.com/watch?v=T1QCCsUpTr0
Watch the link above and then try conducting your own parachuting experiment.