Exercise 5. Give the Ukrainian equivalents to the expressions

the number of the particles; the result of a complicated history; were abundant in the early universe; produced briefly in laboratories; annihilate or decay; the tightly bound clusters; exist diffusely throughout the universe; this tendency is so pronounced; to be never found in isolation; the reasons why quarks insist on clustering; that attempts to describe how quarks behave; involves the interactions; they bind the quarks together; are unstable under present conditions; they change spontaneously into less massive particles; decay into protons in a few minutes.

Exercise 6. Decide if the following statements are true or false.

1. The particle types haven’t been changed since the origin of the universe.

2. Some types of particles can be produced only in laboratories.

3. Scientists know the exact number of particle types.

4. Quarks and electrons are able to form the tightly bound clusters that we call nuclei and atoms.

5. Photons and neutrinos have the same properties that quarks and electrons do.

6. Of the two, electrons have a greater tendency to cluster together.

7. QCD involves the interactions of particles.

8. When in isolation, neutrinos are unstable.

9. Electrons bind together into more complex and lasting objects.

10. Neutrons can bind with each other.