SCIENCE 9 Final Exam Review (January 2023)
Multiple Choice
Identify the choice that best completes the statement or answers the question.
___A_1. Scientific method is
a. an organized way of learning about the natural world
b. a process for doing experiments
c. useful when evidence does not seem to be correct
d. better than empirical observations for doing experiments
__C__2. Scientists are usually people who
a. have a love of learning, so they go to school for a long time
b. work in universities or similar institutions
c. have an interest in learning about the natural world
d. like to work on new inventions for technology to build
__C__3. Scientific observation is
a. evidence gained through experimentation
b. evidence gained by using scientific instruments
c. evidence gained by the use of our five senses
d. only one of the ways that scientists record their findings
__D__4. Empirical knowledge is
a. knowledge gained through the use of empirical
instruments
b. only produced by scientific observation
c. knowledge that is true because it is from observations
d. acquired by careful observation and experimentation
__D__5. A scientific law is a general statement based on
a. empirical data about why things happen as they do in
nature
b. observational data about why things happen as they do in
the laboratory
c. observational data that explains relationships between
natural occurrences
d. empirical data about what has been observed in nature
_A___6. When scientists attempt to test a theory or law, they develop a
hypothesis which is a
a. ||||tentative answer which can be tested
b. tentative explanation which will prove the law or theory
c. prediction about what will happen if the law is correct
d. question about what will happen in an experiment
___C_7. “Astronomy is not really a science because it does not involve
experiments.” This statement is
a. false because astronomers use scientific instruments
b. true because the scientific method requires experiments
c. false because experiments are only one way of doing
scientific research
d. true because horoscopes are not based on scientific
evidence
_D___8. Science does not always provide us with the answers to problems that
we want. This is because
a. we have not had enough time yet to discover what we need
to know
b. there are too many variables that are not subject to the laws
of science
c. science is not the only way to learn; some things must be
learned by other methods
d. science is a way of seeing and learning, not a set of rules for
the natural world
___D_9. Which of the following is a type of science?
a. religion
b. history
c. creation science
d. astronomy
__D__10. Pseudo-science is the practice of
a. intentionally making up or modifying evidence to support
a theory
b. presenting scientific evidence in such a way that it does not
look like science
c. using bias to support a theory that is not actually true
d. presenting non-scientific evidence in a way to make it look
like science
__B__11. If a scientist allows his/her personal feelings to affect his/her
interpretation of evidence, this is an example of
a. hoax
b. bias
c. fraud
d. pseudo-science
__A__12. The belief that jumping up just before a falling elevator hits the bottom
of the shaft could save your life is an example of a(n)
a. urban legend
b. myth
c. proven fact
d. hoax
___B_13. Microscopic organisms can be seen by humans because of the __________
of the microscope.
a. discovery
b. invention
c. production
d. application
___D_14. Which method might you use to determine whether a growth hormone
has a negative effect on young boys?
a. observational study
b. correlational study
c. controlled experiment
d. either A or B
__A__15. If you were studying whether a fertilizer was effective on pea growth,
which of the items listed below could be a control?
a. an untreated patch of the same peas
b. the amount of fertilizer each plant gets
c. the length of time the experiment goes on
d. how the fertilizer is applied to the plants
__B__16. Which of the following is a hypothesis?
a. If I study science more, my marks will improve.
b. My mark in science is lower than I want because I do not
study enough.
c. I want a higher mark in science, therefore, I will study
more science.
d. I wish my mark in science was a little higher.
___A_17. Which of the following is true of a correlation?
a. High positive or negative correlation coefficients show
strong relationships.
b. Only high positive correlation coefficients show strong
relationships.
c. High negative correlation coefficients show weak
relationships.
d. A correlation coefficient of 1 indicates that there is no
relationship.
___B_18. In most scientific inquiry, you start with a
a. hypothesis
b. question
c. plan
d. prediction
__A_19. Although this is not a complete list of the steps you might follow in an
investigation, the correct order would be
a. questioning, predicting, evaluating, communicating
b. predicting, evaluating, communicating, questioning
c. questioning, predicting, communicating, evaluating
d. predicting, evaluating, communicating, questioning
__A 20. In a correlational study, a scientist tries to determine
a. whether one variable has an effect on another
b. whether two variables have any effect on each other
c. which variable causes the other to change its value
d. if several variables have any relationship
__A__21. While conducting your experiment, you find out that the procedure you
planned to follow needs to be modified. It is important to
a. record any modifications you made to the procedure
b. start again, with a new plan
c. remember your changes for the next time
d. finish according to your original plan, and then do it again
___D_22.When you are conducting an experiment it is a lways important to
a. record your observations when you finish your procedure
b. make many qualitative measurements as you go
c. keep a careful total of your expenses
d. make any relevant observations at regular intervals
__B__23. Quantitative measurements include
a. one that describes color, state of matter, odor
b. numerical data, such as measurements or counting
c. any observations that have numbers in them
d. measurements that will be used later in the write-up
_c___24. The most common way that scientists communicate their findings is
a. by writing an article in a scientific magazine
b. reporting to their superiors in a conference
c. writing a lab report
d. writing a book
__D__25.Although these are not the complete list, the correct order of parts to a
lab report is
a. hypothesis, procedure, materials, analysis
b. question, hypothesis, procedure, materials
c. synthesis, hypothesis, procedure, observations
d. hypothesis, materials, procedure, analysis
____26) . Multicellular organisms that reproduce sexually usually produce two
types of cells. The type of cell division that produces the sex cells is
called
a. meiosis
b. mitosis
c. haploidy
d. diploidy
___C_27.
a.
b.
c.
d.
What cells undergo mitosis in an organism?
somatic sex cells
cells which produce gametes
all somatic cells
gametes
__D__28.What cells undergo meiosis in an organism?
a. somatic sex cells
b. gametes
c. all somatic cells
d. cells which produce gametes
__A__29.A human has 23 pairs of chromosomes. If the gene for tongue curling is
found on one chromosome, then
a. it may or may not be found on any other chromosome
b. it will not occur on any other chromosomes
c. it will also be found at the same point on the homologous
chromosome
d. it will also be found at the same point on all 23
chromosomes
__A__30.An ape has 24 pairs of chromosomes. How many chromosomes does an
ape zygote have?
a. 48
b. 24
c. 12
d. 23
__C__31. If a girl’s mother has blue eyes, and her father has brown eyes, the color
of her eyes would be determined by
a. a combination of chromosomes from her parents
b. which chromosome from her parents was first to be
reproduced
c. which allele from her parents was dominant
d. which allele her mother gave her
___A_32.Meiosis is sometimes called “reduction division” because
a. during meiosis the number of chromosomes is reduced to
half
b. there are 4 daughter cells instead of two, so they are
smaller than in mitosis
c. all the cells often do not survive, so there are not as many of
them
d. the amount of genetic information that can be passed by
meiosis is less than in mitosis
__C__33.If meiosis did not reduce the number of chromosomes in the daughter
cells, what might one problem be?
a. sperm would be too large to swim to the egg
b. there would be too many offspring
c. the number of chromosomes in a species would double
every generation
d. soon organisms would be too large to survive
_D___34.Diversity refers to
a. offspring in a species spreading away from the parents
b. the number of different cell types a species has
c. having two separate sexes instead of one
d. the amount of variation among different species
__D__35.Whether an allele is expressed does not depend on
a. the presence of another, dominant allele
b. environmental influences, such as temperature
c. the presence of another, codominant allele
d. the presence of another, recessive allele
__A__36.The difference between alleles and genes is
a. alleles are different forms of a gene
b. genes are variants of alleles
c. nothing, the two words mean the same thing
d. all chromosomes have genes, only some have alleles
__B__37. A hermaphrodite is an organism that
a can reproduce sexually without sexual contact with
. another
b has both male and female organs in the same individual
.
c. results from of problems during cell division
d changes sex from male to female at least once during its life
__B__38. A particular flower has both male and female reproductive organs.
a. This results in cross pollination
b. This flower probably cannot self-fertilise
c. This causes all offspring to be identical
d. This results in a form of asexual reproduction
_D___39.Which of the following are considered male flower parts?
a. stigma, style, pistil
b. petal, sepal, ovary
c. stamen, gonad, pollen
d. stamen, anther, filament
__C__40.
a.
b.
c.
d.
Which of the following flower parts are part of the pistil?
anther, filament, style
petal, sepal, ovary
stigma, style, ovary
stamen, anther, filament
_A___41. When do we begin to consider an egg to be a seed?
a. once it has been fertilized
b. when it starts to develop
c. the words mean the same thing
d. when the fruit develops
_D___42.How do most mammalian fetuses obtain nutrients from their mothers?
a. they are stored in the placenta
b. through the amnion
c. through the allantois —
d. through the umbilical cord
_C___43.How do most mammals protect their developing fetus?
a. They carry their young in a pouch.
b. The eggs hatch inside the mother.
c. The young develop in the uterus.
d. The mother protects them from predators.
_A___44.
Choose the term that best describes “reproductive technologies.”
a. using our understanding of reproduction to enhance
agricultural crops
b. using selective breeding to improve plants or animals for
human use
c. using artificial insemination or cloning to improve quality
of production
d. using plants and animals natural ability to reproduce to
improve crop yields
__C__45.
Which of the following statements is not true of in vitro
fertilization?
a. A surrogate mother can be chosen that is better able to
carry a fetus than the natural mother.
b. Prize animals can be bred together without risking either
parent through mating or pregnancy.
c. The surrogate mother must be genetically closely related to
the baby.
d. Animals can be bred together and many young produced
from a single pair of adults.
_C___46.
Genetically modified plants
a. are carefully tested before they are released for sale to
farmers
b. are not very profitable to their developers because of the
price to develop them
c. are usually controlled by companies that hold patents on
them
d. do not really increase production very significantly
__C__47.
Which statement below best applies to recombinant DNA
technology?
a. Bacteria are used to inject specific genes from one species
into another, producing a new combination of the two
species.
b. New cytoplasm containing DNA is produced which is
responsible for the production of certain hormones to treat
certain specific diseases.
c. Genes from different individuals or different species are
combined in a single molecule of DNA.
d. Sperm and eggs from different species are combined in a
test tube, then inserted into a surrogate mother to produce
new species.
__D__48.Which statement below best applies to genetic engineering?
a. Genetically modified organisms may soon be used in
agriculture.
b. New species are being produced by re-engineering their
chromosomes.
c. Genetically modified organisms cannot pass their genes on
to other populations.
d. A species’ genes can be altered to increase yield or
resistance to disease.
__A__49.Which statement below best applies to external fertilization?
a. Sperm and egg are both outside the body when fertilization
occurs.
b. Fewer offspring need to be produced, because the parents
can see and protect them.
c. Sperm is released around the female, and she takes it into
her body.
d. Sperm remains outside the egg until development is
complete.
__B__50.
Which statement below best applies to internal fertilization?
a. Hermaphrodites reproduce this way, since they have both
male and female sex organs in one individual.
b. Fewer offspring need to be produced, because the zygote is
protected and nourished inside the mother’s body.
c. This form of reproduction can only happen in animals that
do not lay eggs, because they must have a penis.
d. In a laboratory, sperm are injected directly into the interior
(cytoplasm) of an egg, which is then inserted into the
female’s uterus.
__D__51. Which of the following can be determined about a compound from its
chemical formula?
a. the electrical charge
b. the physical properties
c. the chemical properties
d. the proportions of the elements
___D_52.Which of the following describes a polyatomic ion?
a. It has an electrical charge.
b. It is a group of different atoms.
c. It is often unchanged in a chemical reaction.
d. all of the above
_A___53.What are the proportions of metal ions to nonmetal ions in the
compound BaSO4?
a. 1 barium to 1 sulphate
b. 1 barium to 4 sulphate
c. 2 barium to 1 sulphate
d. 2 barium to 4 sulphate
__C__54.
What is the total number of atoms in a single unit of the compound
KOH?
a. 1
b. 2
c. 3
d. 4
____55. Which of the following describes the ammonium ion?
a. It has a 1– ion charge.
b. It contains the element oxygen.
c. It contains five atoms of hydrogen.
d. It behaves like a metal when forming compounds.
__C__56.
How many atoms of oxygen are in the compound Ba(OH)2?
a. 0
b. 1
c. 2
d. 3
__C__57.
What is the chemical formula when 3 ammonium ions combine
with 1 phosphate ion?
a. NH4PO4
b. NH4(PO4)3
c. (NH4)3PO4
d. (NH4)3(PO4)1
__A__58.Which of the following occur when atoms become ions as they form a
compound?
a. one or more electrons are transferred
b. all of the ions have unfilled outer electron shells
c. all of the ions in the compound become uncharged
d. all of the above
__A__59.How are the ion charges balanced when beryllium and oxygen form a
compound?
a. one ion of beryllium balances one ion of oxygen
b. two ions of beryllium balance one ion of oxygen
c. one ion of beryllium balances two ions of oxygen
d. all of the above
‘k
D____60.
What is the total charge on the aluminum ions in the formula,
Al2(CO3)3?
a. 2–
b. 3+
c. 6–
d. 6+
__B__61. In which of the following is the ion charge for nickel the same?
I
NiPO4
II
III
a.
b.
c.
d.
NiSO4
Ni(HCO3)3
I and II only
I and III only
II and III only
I, II, and III
_B___62.What is the name of the ionic compound (NH4)2SO4?
a. ammonium sulphide
b. ammonium sulphate
c. ammonium(I) sulphide
d. ammonium(I) sulphate
__C__63.What is the name of the ionic compound Pb(CO3)2.?
a. lead(II) carbonate
b. lead(II) bicarbonate
c. lead(IV) carbonate
d. lead(IV) bicarbonate
__C__64.
a.
b.
c.
d.
What is the name of the ionic compound Cu(OH)2.?
copper(I) hydroxide
copper(I) hydrogen oxide
copper(II) hydroxide
copper(II) hydrogen oxide
C____65.
What is the chemical formula for the ionic compound rubidium
oxide?
a. RbO
b. RbO2
c. Rb2O
d. Rb2O4
__D__66.What is the chemical formula for the ionic compound tin(IV) iodide?
a. SnI
b. Sn4I
c. SnI2
d. SnI4
__A__67.What is the chemical formula for the ionic compound iron(III)
phosphate?
a. FePO4
b. Fe(PO4)3
c. Fe(PO)4
d. Fe3(PO)4
__C__68.
a.
b.
c.
d.
In which group of the periodic table are the halogens found?
1
2
17
18
__A__69.In which group of the periodic table are the alkali metals found?
a. 1
b. 2
c. 17
d. 18
__A__70.
Moving down a column in the periodic table, what occurs to the
number of electrons in the outermost shell?
a. remains constant
b. decreases gradually
c. increases gradually
d. all of the above
__C__71. Which of the following sets of elements belong to the same group on the
periodic table?
a. oxygen, nitrogen, sulphur
b. calcium, iron, magnesium
c. lithium, potassium, sodium
d. carbon, manganese, silicon
_D___72.Which of the following elements would react in a manner most similar
to nitrogen?
a. neon
b. sodium
c. oxygen
d. phosphorus
__D__73.Which of the following do the Group 1 elements have in common?
a. are all very unreactive
b. all form ions with a charge of 2+
c. all have one less electron than the neighboring noble gas
d. all have one more electron than the neighboring noble gas
__C__74.
Which of the following do the alkali metal elements have in
common with each other?
a. red in color
b. stored in water
c. produce H2 gas when added to water
d. poor conductors of heat and electricity
__A__75.
Boron lies above aluminum on the periodic table. Based on this
information, how might boron form an ion?
a. lose three electrons
b. gain three electrons
c. lose five electrons
d. gain five electrons
__D__76.Which of the following is used to measure electric potential difference?
a. ohmmeter
b. ammeter
c. energy meter
d. voltmeter
__A__77.Which of the following terms describes a lamp connected in a circuit?
a. load
b. energy source
c. cell
d. switch
___B_78.Which of the following describes an electric circuit?
a. stationary charges
b. a continuous path for electricity to flow through
c. the process of building a charge through friction on the
carpet
d. a battery connected by plastic to a light bulb
__B__79.Which of the following refers to more than one source of electrical
energy connected together?
a. cell
b. battery
c. resistors in series
d. light bulbs in series
__B__80.Which of the following is the most common material used in the wires of
circuits?
a. copper
b. aluminum
c. silicon
d. iron
__A__81. Which of the following is a series battery of two cells?
a.
b.
c.
d.
__C__82.
a.
Which of the following is a parallel battery of two cells?
b.
c.
d.
__B__83. What is the purpose of a parallel battery of several cells?
a. more voltage
b. more current
c. less current
d. less voltage
__B__84.What is voltage?
a. total energy contained in the battery
b. amount of energy per coulomb of charge
c. amount of charge
d. amount of charges flowing past a point per second
__D__85.What is current?
a. total energy contained in the battery
b. amount of energy flowing in a circuit
c. total amount of charge
d. amount of charges flowing past a point per second
__A__86.Which of the following is the equivalent of three 30 Ω resistors in series?
a. 90
b. 10 Ω
c. 30 Ω
d. 0.1 Ω
__A__87.What is the equivalent resistance of the following circuit?
a.
b.
c.
d.
30 Ω
0.6 Ω
1.67 Ω
10 Ω
_B___88.Which of the following describes DC voltage?
a. pushes charges in both directions at the same time
b. pushes charges in one direction only
c. discharging current
d. pushes charges in one direction then the other
__D__89.Which of the following describes AC voltage?
a. pushes charges in both directions at the same time
b. pushes charges in one direction only
c. discharging current
d. pushes charges in one direction then the other
__A__90.
What is the purpose of a series battery of several cells?
a.
b.
c.
d.
more voltage
more current
less current
less voltage
_A___91. What is a voltmeter used to measure?
a. potential difference
b. resistance
c. power
d. current
__A__92.Which of the following is the unit for measuring electric current?
a. ampere
b. volt
c. coulomb
d. ohm
__C__93.An ampere is a unit of which of the following?
a. electric potential difference
b. resistance
c. current
d. power
__B__94.Which of the following is used to measure current?
ohmmeter
b. ammeter
c. electric meter
d voltmeter
_D___95.Which of the following is the unit for measuring electrical resistance?
a. ampere
b. volt
c. coulomb
d. ohm
__B__96.An ohm is a unit of which of the following?
a. electric potential difference
b. resistance
c. current
d. power
_A___97.What is the resistance represented by the above graph?
a. 3 Ω
b. 1.2 Ω
c. 0.33 Ω
d. 0.83 Ω
__D__98.What does the slope of the above graph represent?
a. power
b. voltage
c. current
d. resistance
__C__99.
Which of the following represents Ohm’s Law?
a.
b.
c.
d.
__C__100. Which of the following is an ammeter used to measure?
a. potential difference
b. resistance
c. current
d. power
Short Answer
1. 1) Define the term bias as it relates to science.
A scientist allows his or her own views or beliefs to affect their methods.
2) “Scientists look a bit different from other people, because they work
in labs.” There are two things wrong with this statement. What are they?
Scientists are not different from other people, and scientists don’t
always work in labs
3. Write a hypothesis that could be used to test the following question:
“Does ice melt faster if treated with sugar or with salt?”
If salt is added to one sample of ice, and sugar on the other sample of ice,
then, the salt sample will melt faster
Use if in the first part and then in the second part.
4. What is wrong with the statement “Brand X gets your laundry 55%
cleaner!”
How would you test this claim?
5. Put the steps of the scientific process into the correct order in the table.
observe, analyse, communicate, hypothesise, observe, plan, investigate,
predict, record
a) hypothesise
b) investigate
c) plan
d) record
e) communicate
f) analyse
g) predict
h) observe
7. Write a short paragraph explaining the importance of meiosis in sexual
reproduction.
Without meiosis, the cells that would house chromosomes and all other
stuff like that, wouldn’t be able to duplicate and be given to the
offspring.
8. Explain how the flowers of plants that depend on animals for
pollination is different from those that depend on wind.
Flowers of animal pollinated plants are more likely to be brightly
coloured and/or produce a nectar of some sort for flavor and smell.
Stamen and pistil will often be positioned so that the animal makes
contact with them while on the flower. By comparison; wind pollinated
flowers are usually drab.
9. Use an example from real life to briefly describe how scientists have
used their knowledge of sexual and asexual reproduction
Scientists have created ways of having offspring without sexual
intercourse. An example is IVF. An example of asexual reproduction and
how scientists used their knowledge is grafting.
10. Write the chemical formula for each of the following ionic compounds:
(a) 2 sodium ions with 1 sulphate ion
Na2SO4
(b) 1 aluminium ion with three nitrate ions
Al(NO3)3
(c) 2 ammonium ions with 1 sulphur ion
(NH4)2S
(d) 1 aluminium with 1 phosphate ion
AlPO4
11. The formula for magnesium chloride is MgCl2. Write down the
formulae for some other compounds formed by Group 2 and Group 17
elements.
(a) magnesium bromide
MgBr2
(b) calcium chloride
CaCl2
(c) barium iodide
Bal2
(d) strontium fluoride
SrF2
(e) What generalisation can be drawn from your answers?
The generalisation that can be drawn is that the Group 2 and 17 elements
combine in a 1:2 ratio.
12. Describe what is common about the electron arrangement of
(a) the alkali metals.
(b) the halogens.
both needed to gain or lose a single electron to form a stable ion
13. In Group 16 of the periodic table, oxygen is a gas at room temperature
and Sulphur is a solid. Give two reasons why these two elements are
placed in the same group.
Oxygen and sulphur atoms have six electrons in their outermost shell or
highest energy level. Some of their chemical properties are also similar.
14. List the names and formula of both possible combinations of the two
forms of the nickel ion and carbonate.
nickel(II) carbonate: NiCO 3
nickel(III) carbonate: Ni 2 (CO 3 ) 3
15. What is the potential difference across an air conditioner if it has a
resistance of 16.2 Ω and a current of 6.8 A flowing through it?
V= IR
V= IxR
V= 6.8x16.2
Answer: 110.16 V
16. An electric kettle is connected to a 120 V outlet and has a resistance of 9.6
Ω.
What is the current required to operate the kettle?
I=V/R
I=120/9.6
12.5 A
17. The current required to operate a coffee maker is 7.5 A. What is its
resistance when connected to a 120 V circuit?
R=V/I
R=120/7.5
16 Ω
18 When in standby mode, a cellular phone requires a current of 50 mA.
What is its resistance if it operates at 7.0 V?
Divide mA by 1000 to get A. 50/1000 = 0.05
R=V/I
R=7/0.05=140
140 Ω
19 Draw the symbols for the following electrical components:
(a) light bulb
(b) switch
(c) single cell
(d) resistor
(e) ground
(f) fuse
(g) ammeter
(h) voltmeter