Rocks in example sentence
And when we look back in the layers of these rocks, we can find times when the climate was very, very dry on earth, and we can go back many hundreds of thousands of years.
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. 
