5) Quarks and Antiquarks

Question 1

Name three types of quark.

Answer 1

-Up, down, strange.

Question 2

Name the class of particles of which the proton is a member.

Answer 2

-Baryon/hadron.

Question 3

Describe what happens when a positron collides with an electron.

Answer 3

• The electron and the positron are annihilated.
• 2 photons are produced.
• Masses are converted into energy.

Question 4

Describe the change that occurs to the quark structure when a neutron decays.

Answer 4

-A down (d) quark changes to an up (u) quark.