Is the Sun's core made out of rock?

Answer 1

The Sun is not made of Rocks or Iron or Sand or any heavy element.

There are certainly a small fraction of heavy nuclei in the Sun, but that is a very small part of the make up of the Sun. (Scientists have a very detailed understanding of the elements in the Sun since these can be detected as absorption lines in the spectrum of light from the Sun.) Overwhelmingly the Sun is made of two gases, Hydrogen and Helium. It is the fusion of hydrogen into helium that is the nuclear reaction that powers the Sun and gives us sunlight.