Rocks in example sentence
The concept is beguilingly simple: drill at least two boreholes five kilometers deep, inject cold water into one, pass it through the hot rocks, and then bring it back to the surface, where the energy is removed in a power station.
More example sentences with word rocks
And what starts happening is that, around young suns, young stars, all these elements combine, they swirl around, the energy of the star stirs them around, they form particles, they form snowflakes, they form little dust motes, they form rocks, they form asteroids, and eventually, they form planets and moons. 
