Name:______________________________Class:__________________ Date:__________________
Assessment
Subatomic Physics
Teacher Notes and Answers
22 Subatomic Physics
PARTICLE PHYSICS
1.
2.
3.
4.
5.
6.
7.
8.
9.
a
c
b
c
b
c
d
a
Both hadrons and leptons are the
fundamental particles that constitute all
matter. Leptons, of which electrons and
neutrinos are the most important
constituents, are fundamental particles that
are not made up of smaller particles.
Leptons participate in the electromagnetic,
weak, and gravitational interactions, but not
the strong interaction. By contrast, hadrons
are made up of different combinations of
quarks, and hadrons participate in all four
fundamental interactions.
2
10. The charge for the u quark is + e and the
3
1
charge for the d quark is + e . The total
3
charge of the pion is +
2
3
e+
1
3
e , or +e
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
1
Section Quizzes
Name:______________________________Class:__________________ Date:__________________
Assessment
Subatomic Physics
Section Quiz: Particle Physics
Write the letter of the correct answer in the space provided.
_____ 1. What is the order of the fundamental interactions from strongest to
weakest?
a. strong, electromagnetic, weak, gravitational
b. strong, electromagnetic, gravitational, weak
c. strong, gravitational, electromagnetic, weak
d. gravitational, strong, electromagnetic, weak
_____ 2. Which of the following fundamental interactions are effective over a
long range?
a. the gravitational and strong interactions
b. the electromagnetic and weak interactions
c. the gravitational and electromagnetic interactions
d. the strong and weak interactions
_____ 3. Which of the following statements about leptons is correct?
a. Leptons are made up of quarks.
b. Leptons are fundamental particles.
c. Leptons participate in all four fundamental interactions.
d. Leptons participate only in the weak interaction.
_____ 4. Which of the following statements about hadrons is correct?
a. Hadrons are always made up of three quarks.
b. Hadrons are fundamental particles.
c. Hadrons participate in all four fundamental interactions.
d. There are only six types of hadrons.
2
1
_____ 5. What quarks are combined to form a neutron? (u = + e and d = – e)
3
3
a. two u and one d
b. two d and one u
c. two u and one d
d. two d and one u
_____ 6. Besides the field particles that mediate the various interactions, what
basic types of particles, according to the standard model, make up all
matter?
a. three kinds of quarks and three kinds of leptons
b. six kinds of quarks and three kinds of leptons
c. six kinds of quarks and six kinds of leptons
d. three kinds of quarks and six kinds of leptons
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
2
Section Quizzes
Name:______________________________Class:__________________ Date:__________________
Subatomic Physics continued
_____ 7. According to the standard model, which field particles mediate the
electromagnetic interaction?
a. gluons
b. bosons
c. gravitons
d. photons
_____ 8. During the expansion of the universe after the big bang, which
interaction separated from the other three fundamental interactions
first?
a. the gravitational interaction
b. the strong interaction
c. the electromagnetic interaction
d. the weak interaction
9. Describe how leptons and hadrons are related, and how they differ.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
10. One u quark and one d quark combine to form a pion (+). Show how the
combination of these two quarks produces a charge of +e.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Physics
150
Section Quizzes