However, there are some rocks that *appear* to float. This is because they have a lot of air trapped inside, which makes them less dense than water. Examples of these include:
* Pumice: This volcanic rock is very porous and full of air bubbles, making it light enough to float.
* Scoria: Similar to pumice, scoria is another volcanic rock that is full of air bubbles.
It's important to remember that even though these rocks float, they will sink if the air bubbles are squeezed out.
