Rare Plasma Welcome! You are encouraged to register with the site and login (for free). When you register, you support the site and your question history is saved.A quark-gluon plasma, a hypothesized phase of quantum chromodynamics of interest to physicists, is hypothesized to exist at conditions of extremely high temperature or density that never naturally occur on Earth. The conditions engendering quark-gluon plasma were thought to have occurred in the first hundred microseconds or so of the universe. It follows that physicists will never be able to observe quark-gluon plasma. Which of the following, if true, most seriously weakens the argument above? So-called quark stars are hypothesized to exist of extremely dense matter. The temperature of quark-gluon plasma is believed to be 4 billion degrees Celsius. The existence of the quark-gluon plasma was first hypothesized on the basis of observations by physicists. High temperatures and densities not usually found on Earth can be created in particle accelerators. A quark-gluon plasma is thought to consist of asymptotically free quarks and gluons, which are several of the basic building blocks of matter. Review Answer