Final answer:
Particles combine together to form matter through the formation of nuclei, atoms, and molecules. As combinations of particles become larger, their wave nature becomes difficult to observe and they exhibit the properties of matter. Collisions between particles can lead to the creation of new matter.
Step-by-step explanation:
Particles combine together to form the variety of matter one observes through processes such as the formation of nuclei, atoms, and molecules.
When submicroscopic particles combine, they can form larger masses with wave properties. However, as these combinations become larger, their wave nature becomes difficult to observe and they exhibit the properties we commonly associate with matter.
In creating previously unknown particles, known particles are accelerated and directed towards a target. Collisions with target nuclei can result in the creation of new matter.