What Happened to All of the Quarks That Existed Freely

question 105

Multiple Choice

What happened to all of the quarks that existed freely during the particle era?

• A) They combined in groups to make protons, neutrons, and their antiparticles.
• B) They froze out of the soup of particles at the end of the era.
• C) They evaporated.
• D) They combined in groups to make electrons and neutrinos.

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Definitions:

Hinge Joint

A type of joint that allows motion in one plane, similar to the movement of a door hinge, such as the elbow or knee.

Saddle

A supportive structure placed on the back of an animal for riding or an engineering component designed to spread load.

Longitudinal Axis

An imaginary line running from the top to the bottom of an object, defining its vertical orientation.

Rotation

The act of turning around an axis or center point.