Yes, the different jumps are entered differently, and to the untrained eye, they can seem to all look "the same". There are technically seven different kinds of jumps: the Axel, the Salchow, the Toeloop, the Toe Walley, the Loop, the Flip, and the Lutz. The Axel, Salchow, and Loop are what we call "edge jumps", and the Toeloop, Toe Walley, Flip, and Lutz are what we call "toe jumps".
In edge jumps, the skater essentially takes off the "edge"; they jump, rolling off the toepick. In toe jumps, the skater "taps" a toepick into the ice to take off. Toe jumps kind of use the same mechanisms as a pole vaulter would, with the skater's tapping leg equivalent to the pole vaulter's pole.
Toe Walleys, however, are very uncommon, so many skaters only consider there to be six jumps. I am a right-handed skater, so these explanations will be based on what I do. Right-handed skaters rotate counter-clockwise.
The Axel takes off from a left forward outside edge. The Salchow takes off from a left backwards inside edge. In the Toeloop, the skater glides on a right backward outside edge, taps with the left leg, and takes off.
The Toe Walley resembles the Toeloop, but I would glide on a right backwards inside edge, rather than outside. The loop takes off from a right backwards outside edge, but many times, skaters will have their left leg on the ice as well, but no weight is placed over the left side. In the Flip, the skater glides on a left backwards inside edge, taps with the right leg, and takes off.
In the Lutz, the skater glides on a left backwards outside edge, and taps with the right leg. The "double", "triple" or "quadruple" added to the front of these jumps just signify how many revolutions the skater completes in the air. As the names suggest, "single" means one rotation, "double" two, "triple" three, and "quadruple" four.
Combination jumps are completed with any of the jumps first, and then the second and/or third jumps are either Toeloops or Loops. I hope I helped clear things up a bit! And thank you for your interest in this wonderful sport!
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