Quiz: What do you know about water in space?

Welcome to your What do you know about water in space?

Water is a compound of hydrogen with:

What is the most common chemical element of oxygen in the universe?

The composition of comets includes water in the form of:

Does water exist outside the solar system?

How many phases of crystal ice exist?

Why is liquid water considered a good sign of life?

What is an "ice line"?

What determines the possibility of the existence of liquid water on the planet?