St. Francis Preparatory School



1.        

In which sample are the particles arranged in a regular geometric pattern?

A. liquid HCL

B. NaCl dissolved in water

C. N2 gas

D. solid I2

2.        

How many calories are equivalent to 35 kilocalories?

A. 0.035 calorie

B. 0.35 calorie

C. 3,500 calories

D. 35,000 calories

3.        

At room temperature, a 1-gram sample of which substance in a sealed 1-liter container will occupy the container completely and uniformly?

A. silver

B. mercury

C. liquid water

D. water vapor

4.        

The particles in a crystalline solid are arranged

A. randomly and far apart

B. randomly and close together

C. regularly and far apart

D. regularly and close together

5.        

An example of a heterogeneous mixture is

A. soil

B. sugar

C. carbon monoxide

D. carbon dioxide

6.        

How many kilocalories are equivalent to 10 calories?

A. 0.001 kcal

B. 0.01 kcal

C. 1000 kcal

D. 10,000 kcal

7.        

Which is a characteristic of all mixtures?

A. They are homogeneous.

B. They are heterogeneous.

C. Their compositions cannot be changed.

D. Their compositions can be varied.

8.        

Which material is a mixture?

A. water

B. air

C. methane

D. magnesium

9.        

What is the mostly likely temperature of a glass of ice water?

A. 0°C

B. 32°C

C. 100°C

D. 212°C

10.        

Which set of properties does a substance such as helium have?

A. definite shape and definite volume

B. definite shape but no definite volume

C. no definite shape but definite volume

D. no definite shape and no definite volume

11.        

Which quantity of heat does a kilocalorie represent?

A. 100 calories

B. 1000 calories

C. 1/100 of a calorie

D. 1/1000 of a calorie

12.        

The mass of a solid is 3.60 grams and its volume is 1.8 cubic centimeters. Find its density.

A. 2 g/cm3

B. 2.0 g/cm3

C. 0.5 g/cm3

D. 0.50 g/cm3

13.        

A student investigated the physical and chemical properties of a sample of an unknown gas and then identified the gas. Which statement represents a conclusion rather than an experimental observation?

A. The gas is colorless.

B. The gas is carbon dioxide.

C. When the gas is bubbled into limewater, the liquid becomes cloudy.

D. When placed in the gas, a flaming splint stops burning.

14.        

A student obtained the data in the table in a chemistry laboratory. Which of the trials seems to be in error?

|Trial |Temperature |Solubility |

| |(°C) |(grams of KNO3/100 g of water)|

|  |25 |40 |

|  |32 |50 |

|  |43 |70 |

|  |48 |60 |

15.        

During a laboratory activity, a student combined two solutions. In the laboratory report, the student wrote "A yellow color appeared." The statement represents the student's recorded

A. conclusion

B. observation

C. hypothesis

D. inference

16.        

Given: [pic] 

 

Which diagram represents a mixture?

|[pic] |[pic] |[pic] |[pic] |

|  |  |  |  |

17.        

The diagram represents a portion of a 100-milliliter graduated cylinder.

[pic]

What is the reading of the meniscus?

A.  35.0 mL

B.  36.0 mL

C.  44.0 mL

D.  45.0 mL

18.        

Two basic properties of the gas phase are

A. a definite shape and a definite volume

B. a definite shape but no definite volume

C. no definite shape but a definite volume

D. no definite shape and no definite volume

19.        

Which substance has vibrating particles in regular, fixed positions?

A. Ca

B. Hg

C. Cl2

D. CaCl2 dissolved in water

20.        

A sample of water is being heated from 20°C to 30°C, and the temperature is recorded every 2 minutes. Which table would be most appropriate for recording the data?

|[pic] |[pic] |[pic] |[pic] |

|  |  |  |  |

21.        

The diagram represents a Celsius thermometer recording a certain temperature.

[pic]

Which is the best estimate of the temperature reading of this thermometer?

A.  5°C

B.  4.3°C

C.  0.3°C

D.  4°C

22.        

Blacksmiths make metal horseshoes because metals are

A. ductile

B. malleable

C. lustrous

D. brittle

23.        

The units of density could be

A. milliliters per gram

B. milliliters

C. gram

D. grams per milliliter

24.        

Which of the following involves mainly a physical change?

A. gasoline powering a car engine

B. an iron nail rusting  

C. getting a suntan          

D. the formation of a pothole

25.        

Two basic properties of the liquid phase are

A. a definite shape and a definite volume

B. a definite shape but no definite volume

C. no definite shape but a definite volume

D. no definite shape and no definite volume

26.        

A student collected and recorded measurements of the amount of carbon monoxide in the air at the same location each day for one week.  The data are shown in the table. 

[pic]

The student concluded that the amount of carbon monoxide in the air increased and then decreased during the week.  A source of error in the student's investigation is that the student failed to:

A. identify the days of the week

B. identify the month

C. collect data at the same time each day

D. state the method of measurement

27.        

In the diagram, the thermometer held 2 meters above the floor shows a temperature of 30°C.  The thermometer on the floor shows a temperature of 24°C. 

[pic]

What is the change in temperature between the two thermometers?

A. 2°C

B. 6°C

C. 3°C

D. 4°C

28.        

[pic]

As shown in the diagram, an empty 1,000.-milliliter container has a mass of 250.0 grams.  When filled with a liquid, the container and the liquid have a combined mass of 1,300 grams.  What is the density of the liquid?

A. 1.00 g/mL

B. 1.05 g/mL

C. 1.30 g/mL

D. 0.95 g/mL

29.        

A pebble has a mass of 35 grams and a volume of 14 cubic centimeters.  What is its density?

A. 0.4 g/cm3

B. 2.5 g/cm3

C. 490 g/cm3

D. 4.0 g/cm3

30.        

[pic]

According to the graph, what happens to the density of a mass of air when its water vapor content increases?

A. Density decreases.

B. Density increases.

C. Density remains the same.

31.        

The graph shows the masses and volumes of four different earth materials, A, B, C, and D.

[pic]

Which material has the greatest density?

A. A

B. B

C. C

D. D

32.        

[pic]

The diagrams represent particles of the same type of sedimentary rock material collected from a streambed.  The diagrams are drawn to scale.  Which inference about the density of particle A and particle B is most accurate?

A. Particle A and particle B have the same density because they are made of the same material.

B. Particle A has a greater density than particle B because particle A has a greater volume.

C. Particle A has a greater density than particle B because particle A has a greater mass.

D. Particle B has a greater density than particle A because particle B has been worn to a smaller size.

33.        

The current knowledge of the structure of the atom is the result of the investigations and observations of many scientists. The work of these scientists forms a well-accepted body of knowledge about the atom. This body of knowledge is an example of a

A. hypothesis

B. controlled experiment

C. theory

D. research plan

34.        

An experimental design included references from prior experiments, materials and equipment, and step-by-step procedures. What else should be included before the experiment can be started?

A. a set of data

B. a conclusion based on data

C. safety precautions to be used

D. an inference based on results

35.        

Which laboratory equipment is correctly paired with a unit it measures?

A. metric ruler – centigrams

B. Celsius thermometer – degrees Fahrenheit

C. glass beaker – millimeters

D. graduated cylinder – milliliters

36.        

Which condition is necessary for an experiment to yield useful data?

A. Similar results should be obtained when the experiment is repeated

B. Only the expected results should be considered each time the experiment is performed.

C. The hypothesis must be correct.

D. The experimental period must be short.

37.        

In one of his experiments with magnetism, Oersted noticed that a wire carrying an electric current affected a compass needle. This statement would be considered

A. an observation

B. an inference

C. a hypothesis

D. a conclusion

38.        

An investigation was performed to determine the effect of temperature on the activity of a catalyst which breaks down hydrogen peroxide releasing oxygen. Six test tubes, each containing water and equal concentrations of hydrogen peroxide and the catalyst, were maintained at different temperatures. Observations made during the investigation were used to construct the data table below.

[pic]

An increase in the rate of bubbling in each of tubes 1 through 5 would most likely be noticed after

A. increasing the temperature of each tube to 80°C

B. decreasing the temperature of each tube to -10°C

C. increasing the light intensity on each tube, but not the temperature

D. adding more catalyst to each tube

39.        

Base your answer on the investigation described below, the data table, and on your knowledge of science. 

A student cut a piece of potato into 8 cubes, each measuring 5 millimeters along each edge, and placed 7 of them in a beaker containing a 25% salt solution. One cube was removed from the beaker every 10 minutes for a period of 70 minutes and the average length of two sides was determined. The results are shown in the data table below.

[pic]

Which line graph below most accurately showns the relationship between time in the salt solution and size of the cube?

A.

|[pic] |[pic] |

|[pic] |[pic] |

40.        

The basic unit of volume in the metric system is the

A. kilogram

B. gallon

C. liter

D. mass

41.        

The basic unit of mass in the metric system is the

A. kilogram

B. gallon

C. liter

D. meter

42.        

The basic unit of length in the metric system is the

A. kilogram

B. gallon

C. liter

D. meter

43.        

Two scientists, George and Mary, meet. Base your answer to the question on their conversation, below, and your knowledge of the scientific method.

George: Here are pictures of my three children.

Mary: How nice; how old are they?

George: You’re a scientist, you figure it out.

Mary: OK, give me a hint.

George: If you multiply their ages, the result is 36.

Mary: I need more information.

George: If you add their ages, the sum is the age of your oldest child.

Mary: I almost have it, I need one more clue.

George: The blue eyed child is the oldest.

Mary: I figured it out using the scientific method.

Mary rejected the hypothesis that all three children are 12 years old because

A. 12 × 12 × 12 does not equal 36

B. triplets are rare

C. all three children weren’t girls

D. the problem can't be solved

44.        

Two scientists, George and Mary, meet. Base your answer to the question on their conversation, below, and your knowledge of the scientific method.

George: Here are pictures of my three children.

Mary: How nice; how old are they?

George: You’re a scientist, you figure it out.

Mary: OK, give me a hint.

George: If you multiply their ages, the result is 36.

Mary: I need more information.

George: If you add their ages, the sum is the age of your oldest child.

Mary: I almost have it, I need one more clue.

George: The blue eyed child is the oldest.

Mary: I figured it out using the scientific method.

Mary realizes that there are only 8 hypotheses to test because

A. the scientific method tells us not to do more than 8 tests

B. 8 is Mary’s lucky number

C. Mary only has enough time to test 8 hypotheses

D. there are only 8 possible combinations of 3 numbers whose product is 36

45.        

Two scientists, George and Mary, meet. Base your answer to the question on their conversation, below, and your knowledge of the scientific method.

George: Here are pictures of my three children.

Mary: How nice; how old are they?

George: You’re a scientist, you figure it out.

Mary: OK, give me a hint.

George: If you multiply their ages, the result is 36.

Mary: I need more information.

George: If you add their ages, the sum is the age of your oldest child.

Mary: I almost have it, I need one more clue.

George: The blue eyed child is the oldest.

Mary: I figured it out using the scientific method.

Mary tests each hypothesis by adding the ages of the 3 children because

A. scientists always add numbers

B. Mary knows that the sum of the ages is the age of the oldest child and can reject all the hypotheses which do not produce the correct sum

C. the sum of the ages is 36

46.        

Two scientists, George and Mary, meet. Base your answer to the question on their conversation, below, and your knowledge of the scientific method.

George: Here are pictures of my three children.

Mary: How nice; how old are they?

George: You’re a scientist, you figure it out.

Mary: OK, give me a hint.

George: If you multiply their ages, the result is 36.

Mary: I need more information.

George: If you add their ages, the sum is the age of your oldest child.

Mary: I almost have it, I need one more clue.

George: The blue eyed child is the oldest.

Mary: I figured it out using the scientific method.

After Mary made her hypotheses about the ages of the children, she added the ages and looked at the sum. What part of the scientific method is this?

A. problem

B. hypothesis

C. observation

D. conclusion

47.        

Two scientists, George and Mary, meet. Base your answer to the question on their conversation, below, and your knowledge of the scientific method.

George: Here are pictures of my three children.

Mary: How nice; how old are they?

George: You’re a scientist, you figure it out.

Mary: OK, give me a hint.

George: If you multiply their ages, the result is 36.

Mary: I need more information.

George: If you add their ages, the sum is the age of your oldest child.

Mary: I almost have it, I need one more clue.

George: The blue eyed child is the oldest.

Mary: I figured it out using the scientific method.

Recalling that Mary needed more information that the sum of the ages, only 2 possibilities had the same sum. The children had to be either 6, 6 and 1 or 9, 4 and 1. Remembering that the oldest child has blue eyes, Mary reasoned that the six year old twins couldn’t be the oldest. She concluded that the ages were 9, 4 and 1.

What part of the scientific method is this?

A. problem

B. hypothesis

C. observation

D. conclusion

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