The quark epoch is when ________ was/were created.
A)all known matter
B)everything in normal atoms
C)only dark energy
D)protons and neutrons that still survive
E)the rapid inflation of the cosmos

Question

Quizplus · Accepted Answer

During the quark epoch, particles such as quarks and gluons came together to form protons and neutrons, which still exist in the universe today. Therefore, the best choice is D. During the quark epoch, which lasted from about 10^-12 to 10^-6 seconds after the Big Bang, the universe was filled with a dense, hot soup of quarks and gluons. As the universe expanded and cooled, these particles combined to form protons and neutrons, which are the building blocks of atomic nuclei. These protons and neutrons still exist in the universe today, making D the best choice.

The Quark Epoch Is When ________ Was/were Created