Worksheet: Up Quarks and Down Quarks
In this worksheet, we will practice describing the properties of up and down quarks and the composition of protons and neutrons.
What is the relative charge of a down quark?
The table shows the relative charges of the up and down quarks. If a composite particle were made up of 3 up quarks, what would the relative charge of that composite particle be?
What is the relative charge of an up quark?
|Quark||Relative Charge||Relative Mass|
A group of physicists detect a particle that has a relative charge of and a mass times the mass of a proton. Which of the following composite particles, made of up and down quarks, could the mysterious particle be?
- AThe particle cannot be any of these combinations.
- BUp, up, up, down, down
- CUp, up, up
- DUp, up, up, up, down
- EUp, down, down
The diagram shows 4 composite particles. Each particle is made up of 3 quarks. Quarks with the letter u are up quarks, and quarks with the letter d are down quarks. Red particles are particles with a positive electric charge, and blue particles are particles with a negative electric charge.
Which of the 4 composite particles is a proton?
Which of the 4 composite particles is a neutron?
Which of the following is the correct symbol for an up quark?
Which of the following is the correct symbol for a down quark?
Which of the following particles are fundamental particles?
- Up quarks
- Down quarks
- Alpha particles
- Aa, c, and d
- Ba, c, d, and f
- Ca and f
- Da, f, and c
- Eb, d, and e
Which of the following particles are not fundamental particles?
- Down quark
- Up quark
- A(f), (g), and (d)
- B(g), (d), and (a)
- C(c), (f), and (g)
- D(e), (b), and (a)
- E(c), (f), and (a)