Quiz Introduction to Science and Matter shampoo

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					                                     Quiz: Introduction to Science and Matter
Name                                                       Period             Date

Directions: Choose the response that best answers the question.

Use the following passage to answer questions 1-6.
Jonathan and Jessica are completing a lab experiment in which they observe how changing the length of
the blades of a paper helicopter affects the flight time. They make five helicopters. The original, unchanged
helicopter has a blade length of 4 cm. Of the remaining four, two have blades shorter than 4 cm and two
have blades longer than 4 cm. They launch their helicopters from the C House balcony and measure the
length of time it takes the helicopters to land. Each helicopter is launched for a total of 5 times. When they
are finished, Jessica averages the flight times for each helicopter and Jonathan graphs the average flight
time.

1      What is the manipulated variable in this experiment?
          A. the length of the helicopter blades
          B. the kind of paper they use to make the helicopters
          C. the amount of time it takes for the helicopter to land
          D. the height from which Jonathan and Jessica drop the helicopters

2      What is the dependent variable in this experiment?
          A. the length of the helicopter blades
          B. the kind of paper they use to make the helicopters
          C. the amount of time it takes for the helicopter to land
          D. the height from which Jonathan and Jessica drop the helicopters



3      Why would Jessica average the flight times?
          A. to reduce the effect that faulty helicopter launches would have on the results
          B. because her teacher said this was part of the analysis
          C. to reduce the amount of data which she would have to look at
          D. so Jonathan wouldn’t have to graph 20 data points

4      Jonathan noticed that it took Jessica at least two trials to figure out how to properly launch
       the helicopters. How could they deal with faulty launches affecting their data?
           A. don’t worry about faulty launches
           B. leave out any times they don’t like
           C. ask someone else to launch their helicopters
           D. define what is a good and bad launch beforehand and throw out any trials that
                don’t meet their definition

5      When it came time to graph the data, Jonathan was not sure what kind of graph to make.
       Which type of graph should he have made?
          A. bar graph
          B. histogram
          C. line graph
          D. pie graph



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                                    Quiz: Introduction to Science and Matter

6      Jessica looked at the graph that Jonathan made and noticed some mistakes. Which of the
       following could not have been the mistake?
            A. the title was left out
            B. the axes were not labeled
            C. units of measurement were not included
            D. helicopter flight time was graphed on the y-axis




Use the following passage to answer questions 7-12.
Sherwin and Shelby were completing the Mystery Powder lab. They did not have any fresh Biuret solution
and were forced to make some beforehand. They remembered that Mr. Edquid said they would need 0.35
dekaliters of solution to finish the whole lab. Once they gathered the chemicals and were finished making
the solution, they reread the procedure and started the investigation.

7      Sherwin reminded Shelby that this time they should probably follow all the safety rules,
       especially when working with chemicals. Which of the safety rules are important for this
       lab?
               1. Wear goggles
               2. Tie back long hair
               3. Never reach across an open flame or heat source
               4. Clean your area when finished with a laboratory experience

           A.   3 only
           B.   1 and 3 only
           C.   2 and 4 only
           D.   1 and 4 only

8      The lab experience is meant to familiarize Sherwin and Shelby with physical and chemical
       properties. Which of the following is a physical property?
               1. Color
               2. Melting point
               3. Flammability
               4. Texture

           A.   3 only
           B.   1 and 4 only
           C.   2 and 4 only
           D.   1, 2 and 4 only

9      When Sherwin added the iodine solution to test the gelatin for starch, the combination
       turned a brownish red. This color change is an example of a…
           A. physical change
           B. chemical change
           C. physical property
           D. chemical property



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                                    Quiz: Introduction to Science and Matter

10     The combination of gelatin and iodine solution can best be described as a(n)
           A. mixture
           B. element
           C. solution
           D. compound

11     Had the solution turned black and indicated the presence of starch, Sherwin and Shelby
       would have observed a…
              1. physical change
              2. chemical change
              3. physical property
              4. chemical property

           A.   1 and 4 only
           B.   2 and 4 only
           C.   1 and 3 only
           D.   2 and 3 only

12     The amount of Biuret solution required for the lab was given in the uncommon unit of
       dekaliters. What is this amount in milliliters?
           A. 3.5 mL
           B. 35 mL
           C. 350 mL
           D. 3500 mL




Use the following passage to answer questions 13-15.
Jeffrey and Jeremy enjoyed measuring the density of water and wanted to find the density of other liquids
and objects. They brought shampoo, marbles, an apple, and applesauce to school one day and stayed after
to measure their densities. They formulated a hypothesis stating which object would have the greatest
density.

13     What two quantities does one need to calculate the density of an object?
          A. mass and weight
          B. volume and mass
          C. weight and length
          D. volume and weight



14     The shampoo had a volume of 5 centiliters and a mass of 1 hectogram. What is the density
       in grams per milliliter (g/mL)?
           A. 0.2 g/mL
           B. 2 g/mL
           C. 20 g/mL
           D. 22 g/mL



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                                 Quiz: Introduction to Science and Matter

15   Which of the following is a possible hypothesis for this experiment?
        A. I think that the apple will be the densest.
        B. I think that the shampoo will be the least dense because shampoo is supposed to
            be light to clean your hair.
        C. If one measures the density of shampoo, marbles, an apple, and apple sauce, then
            the apple sauce will be the densest.
        D. If one measures the density of shampoo, marbles, an apple, and apple sauce, then
            the marbles will be the densest, because marbles are heavy for their size.




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