Revise GCSE Physics

Question:What is a comet composed of?

A comet is a ball of dust and ice.

Comets travel along paths that orbit the Sun in a highly elliptical orbit.

Comets can be as big as asteroids but are usually smaller.

If the comet has a tail, the tail is made up gases that have boiled off the surface of the comet.

Comets usually develop tails as they travel near to their star, which causes them to heat up