SCIENCE 20F COURSE REVIEW
CHEMISTRY IN ACTION
1. Draw Bohr models/Lewis dot diagrams of the following atoms: Na, O, Al, He, etc.
2. How do the following terms relate to the periodic table? period, family, symbol, atomic
number, reactivity, valence, halogen, alkali metal, rare earth elements, chalcogen,
alkaline earth metals, transition metal, noble gas, metalloid.
3. Explain the relationship of the following terms: valence+electrons+stability,
positive+negative+cation+anion, reactive+metal+non-metal, reactants + products.
4. Predict the ion charge of the following elements: Cl, Xe, Ag, U, Na, S, Al, Ne
5. A compound forms containing K and O. Identify the bond type, give the formula and the
name, and draw either the Bohr model or Lewis dot diagram of the compound formed.
6. A compound forms containing N and Cl. Identify the bond type, give the formula and the
name, and draw either the Bohr model or Lewis dot diagram of the compound formed.
7. Name the following compounds: CaF2, NO3, MgO, N2O5, NaBr, + more
8. Give the formulas of the following compounds: dinitrogen pentaoxide, oxygen difluoride,
carbon disulfide, lithium oxide, potassium iodide, magnesium fluoride.
9. Compare ionic and covalent compounds, using examples. (bond formation, properties)
10. Balance the following equations, and label as synthesis, decomposition, single
displacement, double displacement, combustion or neutralization.
a.
H3O +
OH

H2O
b.
KClO3

KCl
+
O2
c.
KI
+
Pb(NO3)2

KNO3
+
PbI2
11. Chart the properties of acids and bases (include pH, taste, uses, and reactivity, and
examples).
IN MOTION
1. Explain how the following are related, providing an example for each: scalar quantity +
vector quantity, velocity + speed, acceleration + deceleration
2. Two hikers walked a distance of 15.3 km around a lake in 4.4 h. What was their average
speed?
3. Describe how braking distance is affected by vehicle speed and surface friction.
4. Plot the following data for a cyclist on a distance-time graph. Label the graph.
time (min):
distance (km):
30
60
90
120
150
180
9
19
28
29
39
45
- What was the average speed for the cyclist’s trip?
- What might account for the change in speed during the 4th and 6th intervals?
- Estimate how far the cyclist will have travelled after 200 minutes.
5. Describe the motion of a moving vehicle if the line on a distance time graph has the
following characteristics:
- a steep slope
- a short line on the graph
- a horizontal slope (no slope)
- a long line on the graph
- an upward curving slope
- a downward curving slope
6. Use vector diagram on graph paper to show the resultant displacement for the walk from
this classroom to the front desk in the office. (1 large stride = approx. 3 m) (hint you
should have a total of 4 vectors)
7. Do the following represent constant velocity or acceleration? Explain.
d
d
t
v
t
t
8. How are air bags related to momentum and deceleration?
9. If runner #102 accelerates from the blocks (starting line) to 6.3 km/hr in 8.0 s, and runner
# 281 does it in 8.8 s, which runner is likely to win the race if it is a sprint. Explain your
reasoning.
10. A cyclist increases his velocity going downhill, from 0 to 6.7 m/s in 3.5 s. What is his
acceleration?
11. Provide and fully explain everyday examples to explain Newton’s 1st (2 parts), 2nd and 3rd
laws of motion, as well as the law of conservation of momentum and impulse and
momentum.
12. How far does a car travel going 90km/h W for 4.5 hours? Does this calculation describe
constant velocity or average velocity? Explain.
WEATHER DYNAMICS
1. Explain the difference between weather and climate.
2. Identify and describe the four regions of the atmosphere.
3. Explain how major ocean currents play a role in the World’s weather. (particularly our
location in North America).
4. Use a weather map to provide a forecast for a given area. Include the effects of
warm/cold fronts, and high and low pressure systems.
5. Define and provide examples for the following terms: warm/cold front, meteorology,
radiation, conduction, convection, advection, prevailing winds, weather system, high
pressure system, low pressure system, weather, climate.
6. Briefly describe how a severe weather event of your choice is formed.
7. Describe how the Coriolis effect impacts ocean currents, wind patterns, and weather
patterns on earth.
DYNAMICS OF ECOSYSTEMS
1. Explain how the sun is important to ecosystems.
2. Define and explain the relationship between producers, consumers, herbivores,
carnivores, omnivores and decomposers, providing examples for each.
3. Be able to draw and label a food chain and food web for a prairie ecosystem.
4. Explain the roles of photosynthesis and respiration in the carbon cycle, explain the
difference between organic and inorganic carbon, and explain how humans have
impacted the carbon cycle.
5. What are the human impacts on the nitrogen cycle? (Discuss fertilizers, eutrophication
etc.)
6. Define bioaccumulation, and provide an example, using a diagram.
7. What are the factors that increase or decrease a population? Use the terms natality,
mortality, immigration and emigration to determine the change in a population.
8. Describe the four limiting factors of populations, giving examples for each.
9. Provide 3 density-dependent and 3 density independent factors for a population of deer
in a prairie ecosystem.
10. Define the following terms: extinction, carrying capacity, population density, biodiversity,
sustainability, trophic level, ecological niche.
11. Discuss the importance and relationship of each of the above terms to a dynamic
ecosystem.
EXAM INFORMATION:
Date: ________________
Time: ________________
Time: 2 hours (minimum stay = 1 hour)
Total marks: 100
Percent of course: 25%
FORMAT:
- 50 marks multiple choice
- 30 marks for problem type and short answer questions
- 20 marks long answer (Do 4 of 7 questions, each worth 5 marks)
SUGGESTIONS:
- Write answers in full for maximum marks.
- Check all answers for careless errors.
- Make sure you have done all required questions. (Don’t leave anything blank).
- Use the exam itself as a resource for your answers.
- If an answer escapes you, leave it for now and come back to it later (it may
eventually come to you).
- See me if you need help, but NOT on the morning of the exam!!! Do NOT ask for
help just before the exam!!!
- For multiple choice, cover the choices while you think of the correct answer, do not
look for patterns, eliminate obvious wrong answers + cross them out, do not second
guess the exam, use logic!
BRING:
- calculator
- pen and pencil (extra colours if you wish)
- ruler
- water and candy if you like
- your text if you signed one out (or go home and get it!)
DO NOT BRING:
- your cell phone
- your ipod