It's difficult to say definitively which planet has *more* rocks, as it depends on how you define "rocks" and how you measure their quantity.

Here's a breakdown:

* Terrestrial Planets: Earth, Mars, Venus, and Mercury are primarily composed of rock and heavy elements. They all have a significant amount of rocks.

* Gas Giants: Jupiter, Saturn, Uranus, and Neptune are primarily composed of gas and ice, though they likely have rocky cores.

* Rocky Core vs. Surface Rocks: The rocky core of a gas giant is likely far larger than the entire surface area of a terrestrial planet, but it's inaccessible.

So, here's the key takeaway:

While the gas giants likely have a larger overall amount of rock in their cores, the terrestrial planets have much more readily observable and accessible rocks on their surfaces.

Therefore, if you're asking which planet has the most visible and accessible rocks, it would be Earth, followed closely by Mars, Venus, and Mercury.