sciencemrluth.weebly.com · Web viewGRADE 9 SCIENCE EXAM REVIEW INTRODUCTION: 1. a) What are five...

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

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)

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

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?