Question

When a comet nears the sun what happens to its nucleus

it becomes solid

it becomes visible

it disappears

it becomes gas

Answer 1

it becomes gas i just took the k12 test the test is called 5.02 Quiz: Asteroids and Comets

Answer 2

It becomes gas.
Comets are objects composed mostly of ice and dust that grow tails when they approach the sun. All comets have a nucleus, which is the hard rock/ice object. When a comet nucleus nears the sun, solar energy begins to heat the ice and vaporize it.