1.34 describe how the orbit of a comet differs from that of a planet

Source: http://wmatem.eis.uva.es/~marsan/discover/comets/comet-west.gif

1. Four differences between planets and comets are: (roll over lines to see answer)
1. Comets are usually made from _________
2. Comets have highly elliptical _______  compared to planets
3. Comets usually travel _________ than ________
4. Comets usually have long _______ , made when the heat from the Sun which vaporises the comet