Page 199 - Science Course 1 (Book 1)

Mo6-L1: Lesson Review Quiz (Matching)

Directions: On the line before each definition, write the letter of the term that matches it correctly. Each term
is used only once.
1. particle with one negative charge A. neutron
2. smallest particle of an element that still represents that element B. electron

3. particle with one positive charge C. proton
4. neutral particle found in the nucleus D. atom

Mo6-L1: Lesson Review Quiz (Multiple Choice)

Directions: On the line before each question or statement, write the letter of the correct answer.

5. Which scientist discovered electrons?
A. Dalton
B. Aristotle
C. Thomson
6. Ernest Rutherford and his students did experiments that showed the existence of the
A. quark.
B. nucleus.
C. electron.
7. Bohr proposed that electrons are located in
A. the nucleus.
B. an electron cloud.
C. circular orbits around the nucleus.
8. Which particle is NOT made up of quarks?
A. a proton
B. a neutron
C. an electron
9. The results of Thomson’s experiments led him to conclude that
A. atoms are negatively charged.
B. atoms have a consistent neutral charge throughout.
C. charged plates do not affect the path of a cathode ray.
D. cathode rays are made up of negatively charged particles.
10. Which scientist showed that most of the mass and positive charge of an atom is concentrated
in its center?
A. Bohr
B. Dalton
C. Rutherford
D. Democritus
11. The Bohr model of the atom proposed that electrons
A. are paired with protons.
B. are located in an electron cloud.
C. are located in the nucleus of the atom.
D. move in circular orbits around the nucleus.
12. Which phrase best describes a quark?
A. a group of similar atoms
B. a section of the electron cloud
C. a greenish ray with a negative charge
D. a kind of particle that makes up protons and neutrons

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