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1. Which oxygen level best describes a river that contains the lowest variety of invertebrates? (A) 2 mg/L (B) 4 mg/L (C) 6 mg/L (D) 8 mg/L 2. Allowing four - wheel bikes to cross a stream would impact which factor the most? (A) dissolved oxygen level (B) pH (C) phosphate level (D) turbidity 3. Adding which substance to a river increases the phosphate levels? (A) acid (B) antifreeze (C) fertilizer (D) oil 4. Which human action is a global concern? (A) burning fossil fuels in cars (B) dumping sewage in a river (C) growing crops on a farm (D) setting up a landfill 5. Which best describes a water sample that contains the lowest amount of pollution?

pH Turbidity (mg/L)

Dissolved oxygen (mg/L)

(A) 6.5 5.1 9.2

(B) 7.8 11.3 9.6

(C) 11.5 8.9 4.2

(D) 13.4 6.4 2.1

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6. What does the step-like bold line in a periodic table separate? (A) metals and gases (B) metals and non-metals (C) solids and gases (D) solids and non-metals 7. What is always true of a chemical reaction? (A) mass of reactants = mass of products (B) mass of reactants < mass of products (C) number of reactant particles = number of product particles (D) number of reactant particles < number of product particles 8. What property does the pH scale measure? (A) acidity (B) boiling point (C) concentration (D) density 9. Which combination of characteristics best describes magnesium?

State at room temperature

number of electrons

(A) solid 6

(B) gas 6

(C) solid 12

(D) gas 12 10. How many elements are present in MgSO4? (A) 1 (B) 3

(C) 4 (D) 6

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11. A solution has a pH less than 7. Which best describes the solution and a method to neutralize it?

solution method of neutralization

(A) acidic add acid

(B) acidic add base

(C) basic add base

(D) basic add acid 12. Which group of elements have similar properties? (A) B, Al, Ar (B) F, Br, I (C) He, Fe, Be (D) Li, Be, N 13. Calcium reacts with hydrochloric acid to produce hydrogen gas and calcium chloride. Which word equation represents this reaction? (A) calcium + calcium chloride → hydrogen + hydrochloric acid (B) calcium + hydrochloric acid → calcium chloride + hydrogen (C) calcium chloride + hydrogen → hydrochloric acid + calcium (D) calcium chloride + hydrochloric acid → calcium + hydrogen 14. Which combination correctly describes an electron?

Charge Location

(A) negative inside nucleus

(B) negative outside nucleus

(C) positive outside nucleus

(D) positive inside nucleus

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15. Which is a chemical change? (A) car rusting (B) chocolate melting (C) stones being crushed (D) water evaporating 16. Which form of antacid will give the fastest relief? (A) whole tablet (B) split in half (C) quartered (D) powder 17. How many protons and electrons are present in an atom of oxygen?

Protons Electrons

(A) 16 16

(B) 8 8

(C) 8 16

(D) 16 8 18. Which substance can be broken down into more than one type of atom? (A) bromine (B) oxygen (C) water (D) xenon

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19. Substance A decomposes to produce CaO and CO2. Which best describes substance A? (A) atom with the elements calcium, cobalt and carbon dioxide (B) atom with the elements calcium, oxygen and carbon (C) compound with the elements calcium, oxygen and carbon (D) compound with the elements calcium, cobalt and carbon dioxide 20. Excess stomach acid can be neutralized with an antacid. Which graph best shows the change in pH when the antacid reaches the stomach? (A) (B) (C) (D)

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21. In the reaction below, substance C is a gas that turns limewater milky. Which best describes substance C in the reaction below?

  A    +    B →   C   +    D   40g     10g      ?        45g  

Substance Mass (g)

(A) oxygen 5

(B) oxygen 30

(C) carbon dioxide 5

(D) carbon dioxide 30 22. What is the energy supplied to electrons in an electric circuit? (A) current (B) power (C) resistance (D) voltage 23. Which symbol represents a switch? (A) (B) (C) (D)

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24. Which is true of the energy transformation in using a thermocouple? (A) electrical → heat (B) electrical → light (C) heat → electrical (D) light → electrical 25. Which balloons will repel?

Charge of balloon 1 Charge of balloon 2 (A) negative negative (B) negative neutral (C) neutral negative (D) neutral neutral

26. What is the order of energy changes when a bike dynamo is used to power a light? (A) electrical → mechanical → light (B) light → electrical → mechanical (C) light → mechanical→ electrical (D) mechanical → electrical → light 27. A BBQ lighter uses the piezoelectric effect to produce a flame. Which represents the energy changes that occur? (A) chemical → electrical → thermal (B) electrical → thermal → mechanical (C) mechanical → electrical → thermal (D) thermal→ chemical→ electrical 28. What is the voltage of a battery containing three 1.5 V cells? (A) 1.5 V (B) 3 V (C) 4.5 V (D) 6 V

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29. Which device measures the current flowing through a household circuit? (A) ammeter (B) galvanometer (C) thermocouple (D) voltmeter 30. Which varies the amount of brightness or the volume in a device? (A) (B) (C) (D) 31. Which is a load in a simple circuit? (A) (B) (C) (D)

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32. In addition to a bulb and wire, what materials are required in order for a circuit to work? (A) battery and open switch (B) battery and closed switch (C) motor and closed switch (D) motor and open switch 33. Which switches need to be closed to light both bulbs 1 and 3 only?

A

B

C

D

1

2

3 (A) A, B, C (B) A, B, D (C) A, C, D (D) B, C, D

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34. Which displays the change as a light source is moved away from a solar cell? (A) (B) (C) (D)

distance (cm)

current (A)

distance (cm)

current (A)

distance (cm)

current (A)

distance (cm)

current (A)

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35. Which combination of materials produces the highest voltage?

Electrodes Electrolyte

(A) carbon/carbon distilled water

(B) carbon/zinc distilled water

(C) carbon/carbon salt water

(D) carbon/zinc salt water 36. Which method of heat transfer occurs in a wave-like form? (A) conduction (B) convection (C) insulation (D) radiation 37. Which colour jacket keeps you warmest on a cold, sunny day? (A) black (B) grey (C) white (D) yellow

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38. Which part of the room would most likely be the warmest? (A) A (B) B (C) C (D) D 39. Which best describes the energy transfer between the cold pack and the arm? (A) cold moves from the pack to the arm (B) cold moves from the arm to the pack (C) heat moves from the pack to the arm (D) heat moves from the arm to the pack

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40. Which combination of heat transfer methods are required to heat a pot of soup on a stove top? (A) convection and radiation (B) conduction and convection (C) radiation and reflection (D) convection and reflection 41. A drop of wax was added to 4 metal rods, which were then placed in a fire as shown below: The results were as follows:

Rod Time to melt wax (seconds)

A 10

B 20

C 30

D 40 Which statement is true? (A) A is a better conductor than B (B) B is a better insulator than D (C) C is a better conductor than B (D) D is a better conductor than A

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42. Which represents the energy of particles as heat is added to an object? (A) (B)

(C)

(D)

time

energy of particle

time

energy of particle

time

energy of particle

time

energy of particle

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43. Four cups of boiling water were placed in 4 thermos containers made from different insulating materials. The temperature was measured over time. Which material is the best insulator? (A) A (B) B (C) C (D) D 44. Who proposed the theory of natural selection? (A) Charles Darwin (B) Carl von Linné (C) Hans Christian Oersted (D) Michael Faraday 45. Which represents the five kingdoms of classification used by most scientists? (A) Mollusca, Cnidaria, Fungi, Animalia, Plantae (B) Mollusca, Protista, Echinodermata, Animalia, Plantae (C) Prokaryota/Monera, Chordata, Animalia, Plantae, Protista (D) Prokaryota/Monera, Protista, Fungi, Animalia, Plantae

time

temperature

material Dmaterial Cmaterial B

material A

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46. What is the most important function of the structural adaptation illustrated below? (A) obtaining food (B) protection (C) providing movement (D) reproduction 47. The lifecycle of a grasshopper is an example of which type of change? (A) complete metamorphosis (B) incomplete metamorphosis (C) polymorphism (D) sexual dimorphism 48. Which term describes the process of change in a species over time? (A) adaptation (B) diversity (C) evolution (D) reproduction

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49. What stage is represented by the letter A?

A (A) adult (B) egg (C) larva (D) pupa 50. Which describes the variety that exist among organisms? (A) adaptation (B) diversity (C) evolution (D) metamorphosis

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51. Which describes the theory of natural selection? (A)

All individuals share the same traits.

Individuals pass on forms of traits to their offspring.

All individuals reproduce.

(B)

All individuals share the same traits.

Traits between individuals and their offspring differ completely.

Not all individuals reproduce.

(C)

Traits among organisms may vary.

Individuals pass on forms of traits to their offspring.

Not all individuals reproduce.

(D)

Traits among organisms may vary.

Traits between individuals and their offspring differ completely.

All individuals reproduce.

52. Which feature of the finches on the Galapagos Islands helps support the theory of natural selection? (A) beak shape (B) body size (C) leg length (D) wing span 53. A dog`s classification is Canis familiaris. What is the classification of a wolf? (A) Canis lupus (B) Familiaris lupus (C) Lupus canis (D) Musca familiaris 54. Which organism has evolved through artificial selection? (A) San Jose Scale (B) race horse (C) Galapagos finch (D) peppered moth

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55. All of these organisms have developed a similar adaptation for which function? (A) camouflage (B) locomotion (C) mimicry (D) protection 56. We changed our classification from 2 kingdoms to 5 kingdoms because of which instrument? (A) barometer (B) microscope (C) telescope (D) thermometer 57. The Industrial Revolution turned many trees black. Following the Industrial Revolution, the trees made black are slowly turning light in colour. What will happen to the black and white moth populations? (A) black moths will turn white (B) both the black and white moth populations will die off (C) there will be no impact on either the white or black moth populations (D) white moths will increase in numbers

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58. Which graph represents the change in population of the San Jose Scale insects in response to a pesticide? (A) (B) (C) (D)

time

number of insects

time

number of insects

time

number of insects

time

number of insects

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59. Which organism is multicellular, has cells with a cell wall, and does not undergo photosynthesis (A) cat (B) moss (C) mushroom (D) bacteria 60. Using the dichotomous key provided, what is the correct identification of the organism?

1. A) has a long tail.......go to 2 B) has a short tail......Lynx canadensis 2. A) round ears present.........Panthera leo B) pointed ears present......go to 3 3. A) fur is one colour........Puma concolor B) fur is more than one colour.......go to 4 4. A) has stripes on fur............Felis sylvestris B) has spots on fur...............Felis nigripes (A) Felis sylvestris (B) Panthera leo (C) Felis nigripes (D) Puma concolor