Grade 9 Science Exam Review
SNC 1D
Name: ___________________________
Date: ___________________________
In order to best prepare for the exam, there are two main areas of learning you should focus on:
1) Knowledge (learning and understanding the basic facts such as: definitions, formulas, concepts, diagrams…)
* Make STUDY NOTES for the topics listed in this section by summarizing your class notes.
2) Inquiry (mastering the skills of problem solving and interpretation)
* Answer the QUESTIONS in this section to test your understanding of concepts and your ability to make
connections.
Chemistry Unit - Knowledge Topics
1.
2.
3.
4.
5.
6.
7.
Atomic models - Dalton, Thompson, Rutherford, Bohr.
Intro to Period table (groups, periods, families)
Subatomic particles – charge, mass and location of the proton, neutron, and electron.
Bohr-Rutherford Diagrams.
Trends of the periodic table and properties of groups.
Particle theory of matter.
Classification of matter - flow chart for classifying matter (pure substance vs. mixture, element, compound,
atom, molecule) .
8. Physical and chemical properties- definitions and examples of each.
9. Qualitative versus quantitative observations – definitions and examples.
10. Gas tests - the test and its results for the 3 gases (carbon dioxide, oxygen and hydrogen).
11. The concept of density and its formulas – problem solving using the GRASP method.
12. The scientific method; cause and effect experiments; independent, dependent, and controlled variables.
Chemistry Unit – Inquiry questions
1.
An irregularly shaped rock has a mass of 125 g. When placed in an overflow can of water, it displaces 98 mL
of water. Find the density of the rock. Make sure to use the GRASP method.
2. A chocolate bar has the following dimensions: width 5.5cm, length 15 cm, height 1.5 cm. The total mass of
the bar is 50 g. What is the density of the chocolate bar in g/cm3?
3. For each of the examples, state which of the following words apply (atom, molecule, element compound, pure
substance, mixture). Explain why they apply:
a) glucose (C6H12O6 )
d) carbon dioxide (CO2)
b) copper (Cu)
e) oxygen gas (O2)
c) fruit juice
f) silver and gold (Ag and Au)
4. Use your periodic table to complete the following chart.
Atomic
Atomic
# of
# of
# of
Solid, liquid
Symbol
Element name
number
mass
protons
neutrons
electrons
or gas
7
calcium
Li
7
40
7
boron
6
5. Draw a Bohr-Rutherford diagram for: Chlorine (mass 35u), Neon (mass 20u), and Sodium (mass 23u).
6. a) Which of the following metals is the most reactive alkali metal: lithium, sodium, or potassium?
b) Support your choice with an explanation.
7.
Write the name of the element and the symbol for each of the following:
Name
Symbol
a) the element with atomic number 15
b) a noble gas
c) a halogen element
d) a liquid state element at room temperature
8.
Adam decides to run an experiment testing the effect of light exposure on the height of bean plants. He places
one plant in a dark closet, one plant directly under a fluorescent light and one plant in a south facing window.
The height of each plant is measured each day at 4 pm. Adam calculates the difference in height from day 1 to
day 15, and reports the following results: the plant in the closet grew 5.2 cm, the plant under the fluorescent
light grew 25.6 cm and the plant placed in the window grew 18.2 cm. Identify the dependent variable, the
independent variable and two control variables related to Adam’s experiment.
Electricity Unit - Knowledge Topics
1.
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15.
Law of electric charges.
Electron flow through matter (conductors, insulators, resistors definitions and examples)
Static electricity, electric fields
The three factors affecting static discharge
Charging by Friction and Contact, and Induced charge separation.
Using the electrostatic series to predict charges gained by friction.
Current electricity, circuit components and symbols
Circuit diagrams.
Electrical quantities in circuits – quantity of charge, current, voltage, and resistance – definitions, symbols and
units of measure.
Measuring voltage and current in a circuit. (ammeters and voltmeters)
Ohm’s Law (the relationship between resistance, current and voltage) and solving problems sing Ohm’s Law
following the steps of GRASP.
Characteristics of series and parallel circuits.
Voltage and current relationships in series and parallel circuits (V S, V1, V2, IS…)
Concepts and formulas for power ratings, percent efficiency, and cost to operate; solve problems using GRASP.
Factors affecting the resistance of a wire.
Electricity Unit - Inquiry questions
1.
Describe what is happening at each step in the
following diagrams. Name the type of charging
that occurs.
2.
If a material comes into contact with the sphere of a charged electroscope with raised leaves and the leaves of
the electroscope fall, what can you determine about the material?
Explain your answer.
3.
Use the electrostatic series shown here to predict the charge
of each object if
a) A rubber balloon is rubbed against human hair.
b) Cat hair is rubbed with wool.
4.
Would you expect these two objects to
attract each other or repel each other?
Explain your answer.
5.
What would you expect to happen
when the negatively charged rod is brought into
contact with it? What is the name for this occurrence?
Show the movement of charges and explain what the final charge
on both objects.
6.
Draw a diagram that shows what will happen when a positive rod is brought to a neutral sphere and touches
it. Remember your diagram must properly illustrate the charge of the sphere and rod before and after contact.
Use arrows to show the movement of electrons.
7.
a) Sketch a circuit diagram showing a two-cell battery and two light bulbs (1 and 2) connected in parallel.
One light is switched on and the other is turned off. An ammeter is reading the total current in the circuit.
b) If V1 = 6 V, IS = 3 A, and I1 = 1 A, find VS, I2, and R1. Show the formula you used to solve for each.
a) Sketch a circuit diagram showing a 12 V AC-source, a closed switch, with three loads connected in series:
two lamps (1 and 2) and a resistor (3). A voltmeter is reading the resistor’s voltage drop.
b) If VS = 12 V, V1 = 2 V, V2 = 6 V and IS = 3 A, find V3, I2, and R2. Show the formula you used to solve for
each.
Use charge movement to describe how an object can become positively charged.
Summarize how connecting multiple loads in series affects the total resistance, voltage, and current in a circuit.
A radio powered by a 3 V battery draws a current of 1.5 A. What is the resistance of the radio? Use GRASP
to solve.
A clothes dryer has a resistance of 18 Ω. What current will it draw if it is powered by a 220 V source? Use
GRASP to solve.
Calculate the cost of operating a 450 W computer for 600 hours. The rate of electricity is 12 ¢/kW.h.
An electric kettle uses 2.4 x 105 J of electrical energy and produces 1.96 x 10 5 J of heat energy to boil the
water. Calculate the percent efficiency of the kettle.
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14.
Biology Unit - Knowledge Topics
Define and/or explain the following terms. Be specific.
a) Ecosystem
g) Consumer
b) Abiotic and Biotic factors
h) Habitat
c) Carbon footprint
i) Trophic level
d) Sustainable ecosystem
j) Food chain
e) Biodiversity
k) Food Web
f) Producer
l) Population
m) Carrying capacity
n) Photosynthesis
o) Respiration
p) Eutrophication
q) Great pacific Garbage patch
r) Invasive species
Biology Unit Inquiry questions
1. State the requirements of a sustainable ecosystem.
2. Describe a specific example of a sustainable ecosystem and give three specific reasons why it is sustainable.
3. Describe a specific example of an unsustainable ecosystem and give three specific reasons why it is not
sustainable.
4. Give an example of an ecosystem with a high biodiversity.
5. List and provide a description of each of the four spheres of the earth. How are the four spheres connected?
Include a diagram to support your answer.
6. State the 10% energy rule. Use this rule to explain why it is more efficient use of energy to eat a plant based diet
as compared to a meat based diet.
7. Draw a pyramid of energy for an ocean ecosystem where phytoplankton are consumed by zooplankton which are
eaten by sardines which are consumed by otters. The phytoplankton contain 80,000 J of energy.
8. How many trophic levels are in the food chain described in question 3?
9. Explain why there is a loss of energy at the higher levels.
10. Study the following food web. Describe all the population changes that
would occur if
a) a new species of frog entered the ecosystem.
b) a pesticide killed all the birds.
cougar
grass
11. a) Draw the carbon cycle.
b) Classify each process as a carbon sink, a carbon source or a neutral process.
12. The three processes of the carbon cycle that humans have had the greatest impact on are combustion of fossil
fuels/biomass, the dissolving of carbon dioxide into the oceans, and the process of photosynthesis. Explain how
humans impact each process and why it is causing a problem in terms of sustainability of ecosystems.
13. a) Explain why Asian carp are considered to be an invasive species.
b) Which of the five requirements for a sustainable ecosystem would be affected by the introduction of Asian
carp to the Great Lakes? Describe how these requirements are affected.
14. Throughout this unit, we considered the following human impacts on ecosystems of our world:
Human Impact #1
Human Impact #2
Human Impact #3
Human Impact #4
Deforestation
Large Scale Meat Production
Plastics – A Consumer Product
Invasive Species
For each of these human impacts:
a) Discuss how this activity affects the lithosphere, the hydrosphere, the atmosphere, and the biosphere.
b) Describe how this activity can make ecosystems unsustainable by its impact on the five requirements for a
sustainable ecosystem.
c) Describe two possible solutions or alternative practices that would reduce its impact.
Space Unit - Knowledge Topics – This is only a list of topics. See the test review for questions.
1. Big Bang Theory and evidence.
2. Formation of Stars- life and death, different types of stars.
3. Our Solar System- Solar Nebula Theory.
4. Properties of planets- atmosphere and distinguishing characteristics for each, comparison of inner terrestrial and
outer Gas Giants.
5. Celestial Bodies and Eclipses.
6. Triangulation
7. Canada’s contribution to space
8. Galaxies.