Particles are a very important part of this world. From the particles that make up all humans in the world to the particles that make up the clothes we wear. Particles define the world we live in and everything we know about it. From the behavior of particles, scientists can determine many things about the world and how it works. The simple definition of a particle is that it is a tiny piece of matter. While not incorrect, this answer lacks complexity. As stated previously, particles make up everything; but they also constitute the most elementary form of matter, the atom. Protons, neutrons and electrons are all particles that make up an atom. Protons and neutrons themselves are made up of individual particles called quarks. A quark is any of a group of subatomic particles that are among the fundamental constituents. (abyss.uoregon.edu)There are over two hundred subatomic particles that have been detected by the super collider, but not all of them are fundamental, meaning they are all the same, have no shape, and cannot be broken down into something smaller. These fundamental particles include electrons and quarks. These fundamental particles are the most basic and smallest unit of matter yet to be discovered by scientists. The two fundamental particles are quarks and leptons. (Think Quest)Quark and leptons are divided into six flavors that correspond to each generation of matter (red, green blue, anti-red, anti-green and anti-blue). Quarks and antiquarks have electric charges in units of 1/3 or 2/3. Leptons have charges in units of 1 or 0. Normal, everyday matter is the first that is already understood, so scientists often choose to focus on the up and down quarks, the neutral electron... in the center of the paper ... ....participate in changing the flavor of quarks, so its interactions are more difficult to detect. It interacts by influencing the scattering cross sections of neutrinos in what are called "neutral currents". W and Z particles are also involved in the beta decay process, which leads to the formation of beta particles. (Hyperphysics: expar)The universe is made up of about two hundred different types of particles that we cannot see even with the naked eye. All things are made of tiny subatomic particles that are always working to make the world go round. It's amazing that this world is made of such small particles, but it's even more amazing that it only contains 200 different types. These are the ones that have been discovered, but there may be others. Just like all scientific discoveries, there is still much to learn, much to understand, and much more to discover.