This question combines a few different aspects of Earth's structure. Here's how we can break it down:

* Continents and Oceans: These are features of the Earth's surface, which is part of the crust. The crust is the outermost, solid layer of the Earth.

* Molten Rock: Molten rock, called magma, is found beneath the Earth's surface in the mantle. The mantle is the thickest layer of the Earth, located beneath the crust.

To summarize:

* Continents and oceans are features of the crust, the outermost layer of the Earth.

* Molten rock (magma) is found in the mantle, the layer beneath the crust.

Let me know if you have any more questions about Earth's structure!