We just learned a lot about lava, like the Lava Lake.
We've already learned that one type of rock is igneous rock, and it is made from cooled lava.
Another type of rock is sedimentary rock.
That type of rock is made when water flows along and leaves dirt and other parts in a pile over and over through thousands of years.
(from: wikipedia - sedimentary rock)
Kid Facts - Blast from the past: Neutrons Protons & Electrons
