PHYSICAL SCIENCE – G12
1ST QUARTER EXAMINATION
NAME:
GRADE LEVEL:
SCORE:
Multiple Choices. Read and analyze the following questions. Write the letter of your best answer on the space provided
before each number.
1. Why is the Big Bang Theory the most accepted theory for how the universe was formed?
A. It is the simplest explanation for the evidence we have.
B. A small group of scientists said it was the best opinion
C. Religion says it’s the best theory
D. Science has proven it beyond doubt.
2. Which of the following has been used as evidence to support the universe is expanding from a
historical beginning explosion?
A. Light from distant galaxies and planets showing a shift in their wavelengths.
B. Leftover cosmic energy on the horizon of the universes.
C. Same amount of space matter all throughout the universe regardless of where one looks
D. All of the above
3. What do the initial moments after the Big Bang have in common with the universe as it exists
now?
A. All the stars, galaxies, and planets that exist today were formed just a few moments after the Big
Bang.
B. The universe back then could not sustain life, and it cannot sustain life now.
C. The universe was extremely hot then, and it is still extremely hot now.
D. The universe began expanding then, and it is still expanding today.
4. What is one major piece of evidence that the Big Bang theory is correct?
A. Astronomers have detected leftover radiation from the Big Bang
B. Everything in the universe has remained in the same location for billions of years
C. Astronomers have discovered that the universe is no longer expanding
D. Astronomers have discovered evidence that the universe will soon begin contracting in a "Big Crunch"
5. Which is *not* evidence for the Big Bang theory?
A. red-shifted galaxies
B. hieroglyphics describing the instant of the Big Bang
C. smooth cosmic background radiation
D. amounts of hydrogen and helium
6. Which of the following describes stellar nucleosynthesis?
A. The process by which elements are formed within stars.
B. The process by which light elements formed
C. The process by which both light and heavy elements formed.
D. The process by which elements are formed within just after the Big Bang.
7. For the first three minutes after the Big Bang, a substantial amount of neutrons was converted into helium-4 nuclei, before
their decay. What element was combined to other nuclei to form heavier ones such as lithium-7 and beryllium-7?
A. Helium
B. Hydrogen
C. Oxygen
D. Sulfur
8. In the core of a main sequence star, hydrogen is fused into helium via what process?
A. Carbon nitrogen oxygen cycle
C. Proton-proton chain
B. Nuclear fusion
D. Thermonuclear reactions
9. In what process is a more favorable route in converting hydrogen to helium for a massive and hotter star?
A. Carbon nitrogen oxygen cycle
C. Proton-proton chain
B. Nuclear fusion
D. Thermonuclear reactions
10. Aristotle, a Greek philosopher, had a different view on atoms. He disregarded the existence of
atoms proposed by Leucippus and Democritus. What is his belief about elements?
A. He believed that matter is a collection of atoms.
B. He believed that atoms are homogeneous in nature. They have no internal structures.
C. He believed that everything in the universe is made up of the four elements, air, fire, water, and earth.
D. He believed that matter could be divided into tiny particles until such point where it can no longer
be divided anymore.
11. Democritus of Abdera (460 - 370 B.C.) and his teacher Leucippus of Miletus (c.500 B.C.) were Greek scholars. They
became the first proponents of the atomic theory. What is their belief about atoms?
A. They believed that matter is a not collection of atoms.
B. They believed that atoms are not homogeneous in nature. They have internal structures.
C. They believed that everything in the universe is made up of the four elements, air, fire, water, and earth.
D. They believed that matter could be divided into tiny particles until such point where it can no
longer
be divided anymore.
12. In 1803, John Dalton, a British scientist, did experiments on mixtures of gases. After several
experiments, what did he concluded?
A. Atoms are small, negatively charged particles are called electrons.
B. All matter is composed of tiny, indivisible particles called atoms (atomos).
C. Atoms are small, dense, and has a positively charged core called the nucleus.
D. He concluded that all matter is composed of spherical atoms, which cannot be broken down into
smaller pieces.
13. In the early 1900s, Ernest Rutherford, a New Zealand-born physicist, established the planetary model. How did he
described atoms?
A. Atoms are small, negatively charged particles are called electrons.
B. All matter is composed of tiny, indivisible particles called atoms (atomos).
C. Atoms are small, dense, and has a positively charged core called the nucleus.
D. He concluded that all matter is composed of spherical atoms, which cannot be broken down into
smaller pieces.
14. What model of atom consisted of negatively charged particles spread evenly throughout the positively charged material .
A. Plum pudding model
C. Planetary model
B. Spherical model
D. Billiard Ball Model
15. Which of the following models states that a nucleus is surrounded by a cloud of electrons called orbitals?
A. Plum pudding model
C. Planetary model
B. Quantum mechanical model
D. Billiard Ball Model
16. Who is the physicist who established the planetary model of atoms?
A. James Chadwick
C. Ernest Rutherford
B. Neil Bohr
D. John Dalton
17. Who proved the existence of the neutron, which is also situated in the nucleus together with the proton?
A. James Chadwick
C. Ernest Rutherford
B. Neil Bohr
D. John Dalton
18. Whose series of experiments identified the nucleus of the atom?
A. Bohr
B. Dalton
C. Rutherford
D. Thompson
19. Experiments with cathode rays led to the discovery of what sub-atomic particle?
A. electron
B. neutron
C. nucleus
D. proton
20. In Rutherford's experiments, most of the particles
D. were absorbed by the
A. blocked by the foil.
B. combined with the foil.
C. passed through the foil.
foil.
21. What is the smallest unit of an element that can exist either alone or in combination with other such particles of the
same or different elements?
A. atom
B. electron
C. neutron
D. proton
22. A three-dimensional region around a nucleus where an electron may be found is called a(n)
A. electron path.
B. orbital.
C. space.
D. spectral line.
23. What three sub-atomic particles make up an atom?
A. chocolate chips, nuts & raisins
C. protons, electrons & neutrals
24. The following statements refer to atomic models.
1. There is a nucleus at the centre of the atom.
B. positives, negatives &
neutrals
D. protons, electrons &
neutrons
3. The electrons are located in energy levels around the
atom.
2. The nucleus is very small compared to the size of the entire atom.
Which of the following statements apply to Rutherford's atomic model?
A. 1 and 2
B. 1, 2 and 3
C. 1 and 3
D. 2 and 3
25. The planetary model of the atom was stated by:
A. Avogadro
B. Bohr
C. Dalton
D. Rutherford
26. Bohr’s atomic model
A. explains the emission spectra of hydrogen atoms.
B. predicts the energy levels of multi-electron atoms.
C. proposes that electrons occupy specific energy levels.
D. Both a and b
27. When an excited electron in an atom moves from the ground state, the electron
A. absorbs energy as it moves to a higher energy state.
B. absorbs energy as it moves to a lower energy state.
C. emits energy as it moves to a higher energy state.
D. emits energy as it moves to a lower energy state.
28. Which of the following ideas of the Bohr model is not retained in the modern theory of atomic structure?
A. Atoms have a central positively charged nucleus.
B. Electrons can absorb or emit energy only in whole numbers of photons.
C. Electrons move around the nucleus as planets orbit the sun.
D. Most of the volume of an atom is empty space.
29. The Heisenberg Uncertainty Principle
A. assumes that the electrons take positions predicted by Bohr's theory.
B. states that the position and momentum of an electron in an atom cannot be found precisely because measuring the
electron changes its momentum.
C. states that the position of an electron can be found by measuring its momentum.
D. both a and b
30. The quantum-mechanical model of the atom
A. describes an electron probability distribution that determines the most likely location of an electron.
B. is the currently accepted atomic model.
C. makes predictions based on Schrodinger’s wave equation.
D. All of the above
31. In the quantum-mechanical model of the atom, an orbital is defined as a
A. circular path traveled by a proton around an orbital.
B. circular path traveled by an electron around an orbital.
C. region of the most probable electron location.
D. region of the most probable proton location.
32. According to the quantum theory of an atom, what is an orbital?
B. electrons cannot be
A. an electron's position cannot be known precisely.
found.
C. electrons travel around the nucleus on paths of specific radii.
C. Both b and c
33. The region outside the nucleus where an electron can most probably be found is the
A. electron configuration.
B. electron cloud.
C. P sublevel.
D. s sublevel.
34. Which particles are referred to as nucleons (subatomic particles located in the nucleus)?
A. neutrons and electrons
B. neutrons, only
C. protons and electrons
D. protons and neutrons
35. Which subatomic particle is negative?
A. electron
B. neutron
C. nucleus
D. proton
36. Compared to the entire atom, the nucleus of the atom is what?
A. larger and contains little of the atom’s mass
B. larger and contains most of the atom’s mass
C. smaller and contains little of the atom’s mass
D. smaller and contains most of the atom’s mass
37. Who is the first person to express the view that matter is composed of minute particles which was the beginning of the
first atomic theory?
A. Aristotle
B. Democritus
C. Rutherford
D. Sennert
38. In 1897, who used the Cathode Ray Tube to discover the electron and determined its charge to mass ratio?
A. Avogadro
B. Bohr
C. Dalton
D. J.J. Thompson
39. What was Thompson’s model of the atom ?
A. like plum pudding.
B. nuclear.
C. planetary
D. quantum
40. Who is the first person to discover the nucleus?
A. Aristotle
B. Democritus
C. Rutherford
D. Sennert
24. How did Rutherford’s gold foil experiment added to our knowledge of atomic structure.
A. Determined the charge on an electron
B. Determined the charge to mass ratio of the electron
C. Determined that the atom has a central “core” or nucleus
D. Discovered the planetary model of the atom.
25. Robert Boyle was a real scientific detective. He believed that scientists should prove all their
theories by:
A. arguing about them with other scientists
B. conducting experiments
C. dropping apples on their heads
D. both A and C
26. Robert Boyle believed that when carrying out research a scientist should always:
scientist should always:
A. make lots of notes and record all their results
B. take lots of breaks to watch their favourite TV shows
C. wear safety goggles so they would look like real scientists
D. both A and C
27. Boyle’s most important theory is the law that bears his name. Boyle’s Law states that:
Boyle’s Law states that…
A. at a constant temperature the volume and pressure of a gas are inversely proportionate i.e. they move in opposite directions
B. gas is best used to keep fizzy drinks fizzy
C. gas was what made him burp so often
D. both B and C
28. Boyle’s great contribution top the world of science ensures that he will always be remembered
as:
A. A gas man
B. The Earl of Cork
C. The Father of Modern Chemistry
D. The Father of Modern Physics
29. These were “certain primitive and simple, or perfectly unmingled bodies” that were indivisible and whole. This went against the
Aristotelian thinking that objects are made of infinitely divisible elements. It was more like the idea of Democritus and Leucippus.
A. Atomos
B. Corpuscles
C. Elements
D. Neutrons
30. Boyle recognized
as the simplest substances that constitute mixtures, and that elements are those that cannot be
decomposed into other substances via chemical reactions.
A. Atomos
B. Corpuscles
C. Elements
D. Neutrons
31. Antoine Lavoisier showed that air is not an element because it could be separated into sever al components. By looking at the
air
from reacting metals and calces, he found different “types” of air, one of which caused burning to happen. Lavoisier called
it
.
A. chemical element
B. compound
C. Hydrogen
D. Oxygen
32. Antoine Lavoisier showed that water is not an element, because it was made of two substances. Oxygen was found to produce
water when burned in the presence of “flammable air” (a part of air that would be later called
)
A. chemical element
B. compound
C. Hydrogen
D. Oxygen
33. What is a substance that cannot be broken down into simpler components?
A. chemical element
B. compound
C. Hydrogen
D. Oxygen
34. Antoine Lavoisier defined a
as a substance composed of these elements.
A. chemical element
B. compound
C. Hydrogen
D. Oxygen
35. Antoine Lavoisier came up with an initial list of
elements, and created a systematic way of naming elements and the
compounds they created.
A. 23
B. 33
C. 43
D. 53
36. Antoine Lavoisier wrote the first Chemistry textbook. For this and many other contributions, he became known as the Father of
:
A. Biology
B. Chemistry
C. Physics
D. Science
37. While explaining the corpuscular theory, emphasize that Boyle championed the importance of observation and experimentation
in science. This was part of his “
philosophy.”
A. biological
B. chemical
C. mechanical
D. physical
38. Which of the following is not part of Dalton’s atomic theory?
A. A chemical reaction involves rearrangement of atoms.
B. All matter is composed of indivisible atoms.
D. Compounds form when atoms combine in whole
C. Atoms of the same element can be different.
number ratios.
39. Which of the following is NOT a part of Dalton’s Atomic Theory?
A. All matter is composed of extremely small particles called atoms. B. Atoms of different elements combine in simple wholenumber ratios.
C. In chemical reactions, atoms are combined, separated, or
D. Atoms can be subdivided, created, or destroyed.
rearranged.
40. Which of the following is not part of Dalton's atomic theory?
B. The number of protons in an atom is its atomic
A. Atoms cannot be divided, created, or destroyed.
number.
C. In chemical reactions, atoms are combined, separated, or
D. All matter is composed of extremely small particles
rearranged.
called atoms.
41. Dalton's atomic theory agrees with modern atomic theory except for the statement that
A. all matter is made up of small particles.
B. atoms are not divided in chemical reactions.
C. atoms of the same element are chemically alike.
D. all atoms of the same element have the same mass.
42. The smallest unit of an element that can exist either alone or in combination with other such particles of the same or
different elements is the
A. electron
B. proton
C. neutron
D. atom
43. The atomic theories of Dalton, Thomson, Rutherford, and Bohr all support which of the following statements?
B. all matter is composed of tiny, discrete particles called
A. atoms are mostly composed of empty space
atoms
D. atoms are composed of positively and negatively
C. electrons orbit the nucleas of an atom at distinct energy levels
charged particles
44. Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological
order
(i) Rutherford’s atomic model
(ii) Thomson’s atomic model
(iii) Bohr’s atomic model
A. (i), (ii) and (iii)
B. (ii), (iii) and (i)
C. (c) (ii), (i) and (iii)
D. (d) (iii), (ii) and (i)
45. The particles that are found in the nucleus of an atom are
.
A. neutrons and electrons
B. electrons only
C. protons and neutrons
D. protons and electrons
46. The atomic number of an element is the total numbe of which particles in the nucleus?
A. electrons
B. neutrons
C. protons
D. protons and electrons
47. A nuclear particle that has about the same mass as a proton, but with no electrical charge, is
called a(n)
A. electon
B. isotope
C. neutron
D. nuclide
48. The smallest unit of an element that can exist either alone or in combination with other such particles of the same or different
elements is the
A. electron
B. proton
C. neutron
D. atom
49. The total number of protons and neutrons in the nucleus of an
atom is its
A. atomic number.
B. atomic weight
C. mass number
D. atomic mass.
50. The sum of protons and neutrons in an atom equals the
.
A. atomic number.
B. atomic weight
51. The mass number of an element is equal to
A. the total number of electrons in the nucleus
C. less than twice the atomic number
52. Which of the following statements in NOT true?
A. Protons have a positive charge.
C. mass number
D. atomic mass.
.
B. the total numbe rof protons and neutrons in the
nucleus
D. a constant number for the lighter elements
B. Electrons are negatively chareged and have a mass of
1 amu.
C. The nucleus of an atom is positively charged.
D. Neutrons are located in the nucleus of an atom.
53. Who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements.
A. Dmitri Mendeleev
B. Henry Moseley
C. J.J. Thompson
D. John Dalton
54. The nucleus of most atoms is composed of:
A. tightly packed protons
B. tightly packed neutrons
C. tightly packed protons and neutrons
D. loosely connected protons and neutrons
55. An atom is electrically neutral beacause:
A. neutrons balance the protons and electrons
B. nuclear forces stabilized the charges
C. the number or protons and electrons are equal
D. the number or protons and neutrons are equal
56. Whose series of experiments identified the nucleus of the atom?
A. Bohr
B. Chadwick
C. Dalton
D. Rutherford
57. Because most particles fired at metal foil passed straight through, Rutherford concluded that
A. atoms were mostly empty space.
B. atoms contained no charged particles.
C. electrons formed the nucleus.
D. atoms were indivisible.
58. Which of the following are true for an element?
(ii) Mass number = number of protons + number of
(i) Atomic number = number of protons + number of electrons
neutrons
(iv) Atomic number = number of protons = number of
(iii) Atomic mass = number of protons = number of neutrons
electrons
A. (i) and (ii)
B. (i) and (iii)
C. (ii) and (iii)
D. (ii) and (iv)
59. Which of the following statement is always correct?
A. An atom has equal number of electrons and protons.
C. An atom has equal number of protons and neutrons.
B. An atom has equal number of electrons and neutrons.
D. An atom has equal number of electrons, protons and
neutrons.
60. The first model of an atom was given by
A. N. Bohr
B. E. Goldstein
C. Rutherford
D. J.J. Thomson
Prepared by:
ANGEL J. GUILLERMO JR.
Subject Teacher
Checked & Noted by:
DR. JUDALYN V. CATCATAN
SS Principal III