Particles in example sentence
When these particles get to the road, they sense some kind of obstacle, and they bounce against it.
More example sentences with word particles
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. 
