Grade 9 Academic Science Exam Review
Ecology
1. Page 124 – 129 #1 – 4, 6, 8, 20, 23, 24, 29, 34 – 38, 40, 41
– 43
2. See the incomplete equations for photosynthesis and
respiration. Complete each equation. What is the goal of
each reaction?
3. Use the diagram of the food web to answer the following
questions.
a. Name two food chains from the diagram
b. What is the niche of the haw? Grasses? Mouse?
Snake?
c. What is the trophic level of the frog? Mountain
lion? Deer?
d. What organisms would be an example of a
carnivore? Herbivore? Omnivore?
e. What would happen to this food chain if the mouse was removed?
Grasses  mouse owl  hawk
f. What would happen to this food web if the mouse was removed?
g. Using the food chain from part ‘e’, if 50000KJ of energy was available
from the grasses, by the time that energy reached the hawk, how much
energy would be available?
4. Many individuals of the same species living together in a defined area is called
a…?
5. What are the major biomes in Canada? What are their main characteristics?
6. What are symbiotic relationships? Describe each type of symbiotic relationship.
7. What is the difference between biotic and abiotic? Interspecific competition and
intraspecific competition? Density-dependent factor and density-independent factor? Decomposer and scavenger?
8. Which of the following would be an abiotic component? Biosphere, community, population, sunlight.
9. Use the following terms to complete the following sentences: consumer, community, host, predator, photosynthesis, prey,
competition, producers, parasite, factors. A__________ catches, kills and eats its ______________. ______________
feeds by living on or inside a live _______________. One reason that populations are not able to continue growing forever
is because there are limiting _______________. Humans are often in ____________ with other organisms for the same
resources. When a group of different populations lives together, a _____________ is formed. Living things that are able to
use energy from the sunlight to make their own food are called _____________. The process by which plants make their
own food is called _____________. The broad group of organisms that eat food are called ______________.
10. Can you follow a water molecule through the water cycle? How about a carbon molecule through the carbon cycle? Using
the proper terms?
11. What are causes for decreasing biodiversity? How does each affect biodiversity?
12. How do populations grow? (think of population graphs and birth rates, death rates, emigration rates, immigration rates)
13. List the four spheres (ex. Biosphere) and describe each one.
Space
14.
15.
16.
17.
18.
19.
20.
21.
Page 382 – 387 #1 – 5, 8 – 14,16 – 18, 20 – 25, 27, 38 – 40, 43, 45, 48, 50
Explain the following terms: nebula, nuclear fusion, red giant, supernova, white dwarf, black hole.
Explain the diagrams related to the Big Bang Theory.
What are the characteristics of the inner planets? Outer planets? Constellations? Planets?
What is the order of the planets, from the Sun out?
What holds the planets in their orbits around the Sun?
Define the following terms: asterism, asteroid, constellation, galaxy.
Write the following numbers in scientific notation.
a. 0.0035
d. 28 000
b. 46 million
e. 0.000000000012
c. 89 900 000 000
f. 0.00067
22. Write the following numbers in standard form.
a. 3.45 x 105
c. 3.6 x 104
e.
10
b. 8.1 x 10
d. 9.4 x 10-4
f.
2.5 x 10-12
7.3 x 10-6
23. Be able to describe distances in space using A.U.’s, and light years. Why do we use these units when describing distances
in space? Is a light year a measurement of time or distance –
why?
24. Convert the following numbers to A.U.
a. 78 000 000 km
b. 145 000 000 000 km
c. 22 000 km
d. 4.3 x 108 km
25. Convert the following A.U.’s to kilometers.
a. 6.5 A.U.
b. 0.04 A.U.
c. 2.9 A.U.
d. 35 A.U.
26. What is the difference between the geocentric model of the
solar system and the heliocentric model of the solar system?
27. How does the Sun make its energy?
28. How does the Big Bang theory explain the formation of the
universe? What is the evidence that supports this theory?
29. What are the characteristics of stars? How are they related? Be
able to use the Hertzsprung-Russell diagram. How are apparent
and absolute magnitude different from each other?
30. Examine the diagram to the right. What force is represented by
the arrows pointing inwards? What force is represented by the
outward pointing arrows? How could this model of solar system
formation be supported by the fact that our inner planets are
denser than the outer ones?
31. Another version of a star’s life is seen to
the right. Think about the information in
this diagram. What are three ways that
the lives of stars are similar? What are
three ways the lives of larger stars differ
from our star?
32. Can you talk about the movement of
objects in the night sky (ex.
Constellations, the moon, comets) and
use the appropriate terms (ex. revolution,
rotation, eclipses, phases, orbit, etc.) to
describe these motions?
33. The most important star to us is the Sun.
What are the parts of the Sun? Describe
them! How does the Sun create its
energy?
Chemistry
34. Page 246 – 251 #1 – 18, 27, 29, 31, 35,
42, 51 – 54, 56, 59 – 61, 63
35. What state of matter does each diagram represent? Describe what happens to
the particles in state as they change state (ex. closeness, energy, speed,
space).
36. Know your WHMIS symbols and your household hazardous product symbols.
37. Do you know what each of these symbols
stands for?
38. Can you name the different pieces of lab
equipment that WE USED in labs or
experiments this semester?
39. Make metric conversions (there is a practice sheet linked on the website).
40. Convert the following units:
a. 83m3 =
_________________ kL
c. 982 mL =
b. 2.69 m3 =
_________________ L
d. 33 kL =
________________ cm3
________________ cm3
41. Matching
Lustre
You cannot see through a brick, but you can see through a window.
Clarity
Copper and aluminum are easily drawn out into wires.
Birttleness
A smooth, polished metal surface is shiny and can be used as a mirror.
Viscosity
Striking a large sodium chloride crystal with a hammer shatters the crystal.
Hardness
Gold can be hammered into sheets as thin as tissue paper.
Malleability
A bulb will not produce light when connected to a battery with nylon fishing line.
Ductility
A bar of soap is easily scratched with a fingernail.
Conductivity Honey pours much more slowly than alcohol.
42. Matching
Melting
Solid to liquid
Boiling
Liquid to solid
Freezing
Liquid to gas
43. Matching
Calcium
This element has two electrons in its valence shell, and it belongs to the second period.
Beryllium
This element has eight electrons in its outer orbit, which is the second orbit.
Carbon
The outermost electrons of this element lie in the fourth orbit, and it has chemical properties similar to
magnesium.
Fluorine
This element has four electrons in its outermost orbit, and it has the smallest atomic mass of the elements in
its group.
Neon
This element’s outermost electrons lie in the second orbit, and it is the most reactive non-metal in its period.
Potassium This element is the most reactive metal of the top four elements in its group, and it has chemical properties
similar to lithium.
44. Why is J.J. Thomson’s atomic model called the “plum pudding” model?
45. You enter the science lab and see this strange apparatus. You realize that a chemical change is taking
place and you wonder what the products are. Your teacher enters the room and says that you may check
this out if you can answer the following questions correctly. What are some signs of a chemical change?
What are three gas tests that you can describe, including the expected results?
46. Note the Periodic Table to the right and answer the related questions. In what areas are the following
located – metals, metalloids, halogens, non-metals, nobel gases, hydrogen. What decides the order of the
elements in the table? What are three pieces of information found in each block?
47. Draw a Bohr Diagram for each of the following atoms: magnesium, carbon, neon and fluorine.
48. Matching
Chemical property
These are shiny, conduct electricity, and corrode with oxygen.
Physical property
These particles make up pure substances called compounds.
Chemical change
Carbon, oxygen and aluminum are examples.
Physical change
Can include reacting with acid or combustibility.
Element
The particles which make up pure substances called elements.
Compound
Are dull, poor conductors are found on the right in the Periodic Table.
Metal
Melting, dissolving and crushing are all examples.
Non-metal
Signs include a change in colour and a gas being given off.
Atom
Carbon dioxide, water and salt are examples.
Molecule
Include density, colour, texture, and odour.
49. Which of the following are chemical properties and which are physical?
a. The melting point of a substance
c. Combusts when heated
b. Fizzes when acid is added
d. It dissolves in water
50. Which of the following are chemical changes and which are physical changes?
a. Butter melting on popcorn
c. The metal corroding near a door handle
b. Lighting a Bunsen burner
d. Dissolving sugar in a cup of coffee
51. Provide the missing information – either the name of the element of the symbol.
a. B
e. Al
i. Chlorine
b. Ne
f. Beryllium
j. Potassium
c. S
g. Magnesium
d. Li
h. Calcium
52. For each formula, list the type of atoms and the number of each atom in one molecule of the compound.
a. C2H4O2
b. NaNO3
53. Fill-in the blanks. A solid called a precipitate may form in a ______________. There may be a change in ______________.
________________ may be given off. ________________ or light may be given off. The _______________ is difficult to
reverse.
54. Atoms are made up of three subatomic particles: protons, neutrons, and electrons.
Subatomic particles
Label Location
Relative Mass
Charge
Proton
Neutron
Electron
55. Mr. Krabs wants to make Bikini Bottoms a nicer place to live. He has created a new sauce that he thinks will reduce the
production of body gas associated with eating crabby patties from the Krusty Krab. He recruits 100 customers with a history
of gas problems. He has 50 of them (Group A) eat crabby patties with the new sauce. The other 50 (Group B) eat crabby
patties with sauce that looks just like new sauce but is really just a mixture of mayonnaise and food colouring. Both groups
were told that they were getting the sauce that would reduce gas production. Two hours after eating the crabby patties, 30
customers in group A reported having fewer gas problems and 8 customers in group B reported having fewer gas
problems.
a. What people are in the control group?
d. What should Mr. Krabs’ conclusion be?
b. What is the independent variable?
e. Why do you think 8 people in group B
c. What is the dependent variable?
reported feeling better?
56. What are the readings for the volume measurements to the
right?
57. Matching
Pure substances which may not be broken
Compound
down by chemical changes
Changes of state and dissolve are two
Element
examples
Most reactive metals
Physical
change
Most reactive metals
Bohr
Believed atoms were solid, indivisible
Physical
spheres
property
Reacting with acid is one examples
Dalton
Pure substances which may be broken down Chemical
into elements
change
Change of colour and a solid precipitate
Molecule
forming are signs of this
Thought the atoms was like a small solar
Noble gases
system with orbits for electrons
A single particle may be represented by the
Alkali metals
symbol for that element
Gases which have a full outer shell
Thomson
A single particle is represented by the
Chemical
formula for that compound
property
This scientist has the most “delicious” model Element
for the atom
58. What is a positive test for hydrogen gas? Oxygen gas? Carbon dioxide gas?
59. Complete the table
Name
Symbol
Atomic #
Atomic Mass
#P
#N
#e
Beryllium
S
60. Refer to the partial Periodic Table when answering these questions.
a. Circle the family containing beryllium
b. Underline the period containing sulfur
c. Give two properties of beryllium and sulfur based on their
locations in the Periodic Table.
61. 15 g of a liquid takes up 6 mL of space. What is the density of the
liquid?
62. A wooden block has a density of 2.5 g/mL and a volume of 175 mL.
What is its mass?
63. A cylinder that has the following dimensions (height = 13.4 cm and
diameter = 12.8 cm) has a mass of 87.5g. What is its density?
64. A graduated cylinder with a mass of 204 g had 38 mL of a liquid poured into it. The mass of
the cylinder and its contents is 271g. What is the density of the liquid?
65. A 4.6 kg object has a density of 9.4 g/cm3. What is its volume?
66. If a block of wood is 5 cm x 2 cm x 7.5 cm has a mass of 45 g, what is its density?
67. What is the purpose of this object in the diagram on the right? When would you use it and how?
68. Determine the density of the object in the diagram to the right if the mass of the object is 12.5g.
Electricity
69. Page 506 – 511 #1 – 10, 11a, 12, 15 – 21, 23 – 25, 35, 36, 41, 42, 45 – 48, 50, 52, 55, 57 - 60,
61, 62
70. Categorize each diagram by matching it with the related term. Choices may be used more than
once.
a. Series
b. Parallel
71. What are the symbols for…?
Battery
Connecting wire
Open switch
Voltmeter
Ammeter
Fuse
Resistor
Closed switch
Lamp
Electric Motor
72. Use the electrostatic series to predict the charge of each object if cat hair comes into contact with wool.
73. Summarize the reason for placing lightning rods on top of buildings.
74. What is the charge of the door handle shown in this picture? What is the charge of the
hand? Describe what is likely to happen when the hand touches the door handle.
75. Would you expect these two objects to attract each other or repel each other?
Explain your answer.
76. What is the difference between a conductor and an insulator?
77. Use the following figure to describe why the balloon is attracted to the wall. What
is the resulting charge on the wall?
78. Sketch a circuit diagram of a circuit that contains a battery, two lamps, and an
open switch connected in series.
79. Sketch a circuit diagram of a circuit that
contains a battery, four lamps, and an open
switch connected in parallel.
80. Is the following circuit series or parallel?
Explain the reason for your answer.
81. Which of the following circuit
diagrams shows the correct way to
connect a voltmeter to a circuit?
Explain your answer.
82. Summarize Ohm’s Law.
83. Which of the following circuits
84.
85.
86.
87.
would you expect to have less resistance? Explain your answer.
What is the charge on a neutron? Why?
What is the device called that is used to detect and identify static charge called?
What method of charging results in a neutral object receiving the opposite charge?
What happens when a neutral metal sphere is charged by induction with a negatively
ebonite rod and ground wire?
charged
88.
89.
90.
91.
92.
What would happen to the brightness of lamps if you added another one into a parallel circuit?
What unit is resistance measured in? What unit is current measured in?
What are the four factors that affect the resistance of a wire? Explain each factor.
What is the resistance of the resistor in the circuit to the right?
In a circuit, the potential difference of the energy source is 22V and the resistance is
0.4Ω. Calculate the current.
93. More Ohm’s Law problems linked on the website.
94. In a series circuit, what the relationship between the potential difference at your energy
source, and the potential difference at the each of the loads? What about the current?
95. In a parallel circuit, what the relationship between the potential difference at your
energy source, and the potential difference at the each of the loads? What about the
current?
96. Explain how you would give a pith ball a positive charge if you charged it by contact. Be sure to talk about electrons!
97. Explain how you would give a metal leaf electroscope a negative charged if you charged it by induction. Be sure to talk
about electrons and grounding!!!
98. What would the charge on the following two items be if they were rubbed together: aluminum & polyester? Explain your
answer in terms of what happens to the electrons
99. What are some practical uses of static electricity? Can you explain how one of them works?
100. What is the difference between current and static electricity?
101. What are the four main parts of a circuit?
102. What is voltage, current, and resistance?
103. Calculate the watts of an electrical device if…
a. V= 200V and R = 180Ω
b. V= 68V and R = 100Ω
104. Calculate how much energy is used if… (remember, you need to put the time into hours and change it kWh)
a. P = 65W and t = 7 hours
c. P = 300W and t = 12 hours/day for 15 days
b. P = 90W and t = 5 days
d. P = 45W and t = 3 weeks
105. If electricity costs $0.09 per kWh, how much would it cost to operate the following devices for…
a. Light bulb, 56 kWh
b. 0.78 kWh fridge for two years
106. What is the percent efficiency of a computer if it uses 45J of input energy to produce 21J of usable energy?