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1 GRADE 9 SCIENCE EXAM REVIEW
INTRODUCTION:1. a) What are five different safety rules?
b) What is WHMIS?c) Symbols and substances
Symbol Description Example Symbol Description Example
2. Define:a) hypothesis -b) dependent variable -c) independent variable -d) controlled variable -
3. For the following problems, identify the variables. A) Which brand of paper towels absorbs the most water?B) Which shampoo is the best for hair?
dependent -independent -controlled (3) –procedure:
ATOMS AND ELEMENTS1. What are five potential indicators of chemical change?
2. a) What is a physical change? example?
b) What is a chemical change? Example?
3. Testing of Gases
Oxygen Hydrogen Carbon Dioxide
Identifying Test
Physical Properties
Chemical Properties
Chemical Formula
4. . Periodic TableFamily Name Group # Property in Common Examples
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5. Elements
C3H8 C6H12O6 H2SO4
Elements Present
# atoms per molecule
6. Atomic ParticlesElectrons Protons Neutrons
SizeWhere found in atomCharge
7.Element, Symbol Atomic Number Mass Number # protons # electrons # neutronsBoron, BChlorine, Cl
19Iodine, I 131Calcium ion, Ca2+
8. # protons - # protons -
# neutrons - # neutrons -# electrons - # electrons -
9. What is an ion?
10. Draw Bohr-Rutherford diagrams of a) Al b) Be c) F -1
ELECTRICITY1. What is a charge?2. a) What is a conductor? example? b) What is an insulator? example? c) What is a semi-conductor? example?3. How can you make a charge? How can you discharge it?
4. What are the Laws of Electric Charges?
5. How does lightning occur? Draw a diagram with clouds, ground, and charges included.
6. What are three examples of uses for electrostatics?
7. Units and SymbolsSymbol Unit Unit symbol
CurrentPotential Difference(voltage)
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EnergyPowerResistance
8.What is resistance?
9. What are the four factors that affect resistance in a wire?
10. Series and Parallel CircuitsSeries Parallel
Path for electronsCurrent at different pointsPotential difference at different pointsUnscrewing a light bulbEquations for current and potential differenceDiagram: contain 3 bulbs, a switch, a 6V battery, 2 voltmeters and an ammeter
12 a) How does the circuit breaker protect you in your house? What is its purpose in a house?b) What features make your electrical outlets safe?
c) How can you save energy around the home? List 8 things you can do.
ECOLOGY1. What do the following terms mean?
a) Carrying capacityb) Sustainabilityc) Biodiversityd) Ecologye) Biospheref) Population
2. Draw a food web using the organisms found in this picture and adding 2-3 of your own.
c) What would happen to the populations in your food web if the fish were over-fished?
3. What is the equation for photosynthesis?4.Term Definition ExampleProducerConsumerHerbivoreOmnivoreCarnivore
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Detritivore
5. Biotic InteractionsInteraction Description Specific ExamplesCompetitionPredation
6. List 5 abiotic factors and 5 biotic factors that will affect populations in ecosystems.7. What are 5 different ways that humans impact the environment? What are you going to do in your community to have much less impact?