Name: Class: Date: Semester 1 Review
Indicate the answer choice that best completes the statement or answers the question.
1. _____ cannot be formed during a chemical reaction.
a. Atoms
b. Bonds
c. Bubbles
d. Precipitates
2. Approximately how many elements are metals?
a. half of the periodic table
b. one-third of the periodic table
c. three-fourths of the periodic table
d. all of the periodic table
3. In a chemical reaction, energy is released _____.
a. only when bonds are broken
b. only when bonds are formed
c. when bonds break and when bonds form
4. In general, nonmetals are ____.
a. good conductors of electricity
c. good conductors of heat
b. malleable and ductile
d. gases at room temperature
5. What is meant by periodic in Periodic Table?
a. the table has repeated cycles
b. the elements occur more than once
c. the table is only good for so long
d. the table can be changed as needed
6. On a speed-time graph, a perfectly straight horizontal line shows the change in speed is ____.
a. –10
b. 10
c. 1
d. 0
7. In the compound, H2O, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming
____.
a. cations
b. ionic bonds
c. nonpolar molecules
d. polar bonds
8. Why can the Moon be seen from Earth’s umbra during a total lunar eclipse?
a. The Moon emits just a little bit of light on its own.
b. Earth has some places where it is not very dense, so the sunlight gets through.
c. There are so many electric lights on Earth, they reflect from the Moon.
d. Earth’s atmosphere deflects some sunlight into the umbra.
9. The Sun's rays strike Earth at their northernmost and southernmost positions during ____.
a. winter and summer solstices
b. spring and fall equinoxes
c. lunar eclipses
d. solar eclipses
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Name: Class: Date: Semester 1 Review
10. Why is the law of conservation of mass true?
a. All atoms at the start of a chemical reaction are present at the end of the reaction.
b. All the molecules in a substance remain intact during a chemical reaction.
c. The substances at the start of a chemical reaction gather more atoms to make up for those lost in the
reaction.
d. All molecules at the start of a chemical reaction are present at the end of the reaction.
11. When Mendeleev published his periodic table, there were some spaces for undiscovered elements. Below is a
section of a similar table. A reasonable value for the atomic mass of the missing element is ____.
a. 101
c. 68.2
b. 72.3
d. 34.8
12. A chemical bond that occurs when atoms share electrons is a(n) ____ bond.
a. covalent
b. ionic
c. magnetic
d. polyatomic
13. The atoms in the products of a chemical reaction _____.
a. were present in the reactants
b. did not exist before the reaction
c. were created using energy from the reaction
14. Which of the following determined that cathode rays are negatively charged and are made of electrons?
a. Aristotle
b. Dalton
c. Rutherford
d. Thomson
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Name: Class: Date: Semester 1 Review
15. Which best explains the graph below?
a. The speed is zero and does not change.
b. The speed of the object increases at a steady rate over time.
c. The speed of the object decreases at a steady rate over time.
d. The speed of the object increases and decreases over a given amount of time.
16. In an atom, electrons ____.
a. are located in the nucleus
b. are paired with neutrons
c. travel outside the nucleus
d. are always in the same place in an atom
17. The energy levels of an atom are occupied by ____.
a. electrons
b. protons
c. neutrons
d. ions
18. The seasons are caused by ___________.
a. the direction Earth’s rotational axis is pointed with respect to the Sun
b. the distance Earth is from the Sun
c. the shape of Earth’s orbit
d. the tides of the ocean
19. A moving train car collides with another train car that is motionless on the track. The train cars are the same
size. How does the final momentum of the two cars compare to the momentum of the first car?
a. It is the same.
b. It is double.
c. It is half.
d. It is zero.
20. The maximum number of electrons in the second energy level of an atom is ____.
a. two
b. four
c. eight
d. ten
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Name: Class: Date: Semester 1 Review
21. When Rutherford performed his gold foil experiment, he was surprised that some of the alpha particles ____.
a. were deflected by the foil
b. bounced back from the foil
c. were absorbed by the foil
d. passed straight through the foil
22. The unit of force is ____.
a. m/s
b. the hertz
c. the joule
d. the newton
23. An ion is an atom that has gained or lost _____.
a. electrons
b. protons
c. neutrons
d. metals
24. Atoms that gain electrons become ions with a _____ charge.
a. equal
b. negative
c. positive
d. like
25. Elements found on the far right of the periodic table in Group 18, are referred to as _____ and are chemically
stable.
a. metals
b. nonmetals
c. metalloids
d. noble gases
26. A single proton has which electrical charge?
a. no charge
b. positive charge
c. negative charge
d. either a positive or a negative charge
27. An unbalanced force acting on an object causes it to ____.
a. move at constant speed
b. continue in a straight line
c. not change its velocity
d. accelerate
28. Forces that are equal in size but opposite in direction are ____.
a. balanced forces
b. frictional forces
c. inertial forces
d. net forces
29. Acceleration is a change in ____.
a. speed
b. velocity
c. displacement
d. position
30. This formula shows the chemical reaction that occurs when the body breaks down sugar. How many carbon
atoms are needed for this reaction to take place?
a. 1
c. 6
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b. 2
d. 12
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Name: Class: Date: Semester 1 Review
31. In general, metals are ____.
a. poor conductors of heat
c. poor conductors of electricity
b. brittle
d. good conductors of heat
32. Most of the mass of an atom is found in its ____.
a. nucleus
b. electron cloud
c. atomic number
d. mass number
33. In a chemical reaction, the mass of the products is always _____.
a. equal to the mass of the reactants
b. less than the mass of the reactants
c. greater than the mass of the reactants
34. How are elements arranged on the periodic table?
a. in alphabetical order from top to bottom
b. in diagonal groups according to their size
c. in clusters according to their date of discovery
d. in rows and columns according to their properties
35. Summer occurs on the hemisphere of Earth that is ____.
a. turned away from the Sun
b. tilted toward the Sun
c. tilted away from the Sun
d. turned toward the Sun
36. The place of an element in the modern periodic table is determined by its _____.
a. atomic number
b. atomic mass
c. density
d. chemical activity
37. Based on his experiment, Rutherford concluded that atoms were ____.
a. dense positively charged particles
b. uniform throughout
c. mainly empty space
d. made of protons, neutrons, and electrons
38. Which of the following is certain proof a chemical reaction has occurred?
a. bubbles
b. change of chemical properties
c. change of color
d. all of the above
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Name: Class: Date: Semester 1 Review
39. Which phase of the Moon is shown if this is a picture of what the sky looks like at midnight?
a. new moon
c. full moon
b. first quarter
d. third quarter
40. Which of the following best describes how constant velocity is shown in a speed-time graph?
a. a line curving down
b. a line curving up
c. a straight horizontal line
d. a straight diagonal line
41. Which type of atom forms a flexible bond with other atoms of the same element by sharing a large pool of
valence electrons?
a. metal
b. metalloid
c. nonmetal
42. Metallic compounds _____.
a. are poor conductors of electricity
c. have low melting points
b. dissolve in water
d. can be hammered into sheets
43. What formed the craters on the Moon?
a. volcanoes
b. lava flowing up through the Moon’s crust
c. impacts from objects in space
d. tectonic plate movement
44. Which scientist developed this model for atoms?
a. Dalton
b. Democritus
c. Rutherford
d. Thomson
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Name: Class: Date: Semester 1 Review
45. All chemical reactions result in the formation of _____.
a. bubbles in liquids
b. precipitates in liquids
c. substances with different colors
d. substances with new chemical properties
46. Which of the following is a force?
a. momentum
b. friction
c. acceleration
d. velocity
47. The yearly orbit of Earth around the Sun is called its ____.
a. rotation
b. ellipse
c. revolution
d. tilt
48. What is the name given to the units that make up covalently bonded compounds?
a. molecules
b. ions
c. electrons
d. energy levels
49. The particles that make up an atom are ____.
a. electrons, protons, and nuclei
b. elements, protons, and electrons
c. protons, neutrons, and nuclei
d. protons, neutrons, and electrons
50. Where are metals on the periodic table?
a. only in periods 3 and 4
b. to the right of nonmetals
c. on the left side of the table
d. between metalloids and nonmetals
51. Who proposed this model of atoms?
a. Dalton
c. Rutherford
b. Democritus
d. Thomson
52. When a car slows down at a traffic light, it is ____.
a. accelerating
b. traveling at constant velocity
c. decreasing its displacement
d. changing direction
53. Which of the following elements will likely form a negative ion in its ionic compounds?
a. Li, lithium
b. Al, aluminum
c. Mg, magnesium
d. Cl, chlorine
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Name: Class: Date: Semester 1 Review
54. In an atom, electrons ____.
a. are located in the nucleus
c. travel outside the nucleus
b. are paired with neutrons
d. are always in the same place in an atom
55. The total distance traveled by an object divided by the total amount of time needed to travel equals the _____.
a. average speed
b. friction
c. average acceleration
d. net force
56. How many electrons are needed in the outer energy levels of most atoms for the atom to be chemically stable?
a. 2
b. 4
c. 6
d. 8
57. Which particles have almost the same mass?
a. proton and electron
b. proton and neutron
c. electron and neutron
d. all three particles
58. Which item best represents Thomson’s mental image of an atom?
a. a sponge
b. a chocolate-chip cookie
c. a bowling ball
d. a beach ball
59. Aluminum oxide is a chemical formula with two aluminum atoms and three oxygen atoms. Which is the correct
chemical formula?
a. A12O3
b. (A12)O3
c. 2AlO3
d. Al3O2
60. Your mother picks you up at school. It takes 10 minutes for the 5-km drive home. Which of the following can you
calculate a value for with the information given?
a. acceleration
b. velocity
c. average speed
d. instantaneous speed
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Name: Class: Date: Semester 1 Review
Answer Key
1. a
2. c
3. b
4. d
5. a
6. d
7. d
8. d
9. a
10. a
11. b
12. a
13. a
14. d
15. b
16. c
17. a
18. a
19. a
20. c
21. b
22. d
23. a
24. b
25. d
26. b
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Name: Class: Date: Semester 1 Review
27. d
28. a
29. b
30. c
31. d
32. a
33. a
34. d
35. b
36. a
37. c
38. b
39. b
40. c
41. a
42. d
43. c
44. c
45. d
46. b
47. c
48. a
49. d
50. c
51. a
52. a
53. d
54. c
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Name: Class: Date: Semester 1 Review
55. a
56. d
57. b
58. b
59. a
60. c
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