Water Rockets 1 by decree

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									DESIGNING        AN    EXPERIMENT: BOTTLE ROCKET LAB
Integrated Science 1            Name:                                              Date:                    Per:

1. INTRODUCTION / PURPOSE

       The purpose of this assignment is to practice designing a controlled experiment to test a hypothesis.
       The specific question we will address is:
                     “What is the optimum amount of water to use in a water rocket?”



2. EXPERIMENTAL DESIGN (MATERIALS                            AND     PROCEDURES)

       Your instructor will discuss the rocket launching system you will be using in this lab. Take notes in
       the space below. Use these notes to help you write a final draft Experimental Design section in your
       formal lab report.

  MATERIALS:




  PROCEDURES:
   Safety Considerations:
       Anyone within 20 meters of the launch pad must wear safety goggles.
       Never put your head over a pressurized rocket.
       Stay low to the ground when launching rockets.
       Every launch must begin with a countdown: “5-4-3-2…1!”
       Pay attention when rockets are being launched. A “heads up” approach will help prevent you from being hit by a
          rocket. Use common sense.
EXPERIMENTAL DESIGN WORKSHEET:

Title:


Hypothesis:




Independent Variable I.V:


Levels of I.V.
(2 or more plus the control,
Number of trials you will conduct for each I.V. level


Dependent Variable:


Constants:




 FINAL WRITE-UP INSTRUCTIONS

    You are responsible for typing a formal Lab Report for this experiment. Refer to the Lab Report
    Format handout in the reference section of your binder The Lab Report is due: ________________.

1. Follow the outline exactly. Type each section heading in bold with its corresponding letter. Then skip a line and
    record the appropriate information. Please use 12 point font, 1” margins, and double space.
2. Your name and period should be at the top of the first page. Do not use a separate cover sheet.
3. Use the Lab Report Format as a guide in creating your lab report. The following are special instructions for this
    particular lab report:
    A. Title: Write your title in the correct format.
    B. Introduction/Purpose: Answer questions on Lab Report Format in paragraph form, but no additional
    research or literature review required.
    C. Hypothesis: Follow instructions in Lab Report Format.
    D. Experimental Design: Label individual sections. List materials. List procedure in a numbered outline.
    Include design outline.
    E. Data/Results Section: Attach final hand-written drafts of data tables and graphs. In lab report, write „see
    attached‟ under section heading.
    F. Discussion: Follow the instructions in the Lab Report Format. Write 1 paragraph/bullet, making 5 total
    paragraphs. In paragraph 5, answer the following analysis questions:
        1.How is flight time is related to water volume? Make references to the data in table 1 and graph 1. Include
        actual data values.
        2.Does the amount of water in the rocket seem to have an effect on the height achieved by the rocket? Explain
        your answer. Make references to data table 3 and graph 2.
        3.Discuss how Newton‟s laws affect the flight of a bottle rocket. Which of Newton‟s laws has the most effect
        on each of the different levels of the independent variable?
    G. Conclusion: Follow instructions in Lab Report Format.
    H. Bibliography/References Cited: This section is not required for this lab report.

                                                           2                                         Bottle Rocket Lab
DATA TABLES

      On a piece of scratch paper construct data tables for this experiment. After teacher approval,
      construct a final draft version in the space below. Refer to Data Table Design Handout for
      guidelines. Use a ruler.

Data Table 1: Volume of Water vs. Flight Time (two trials, include mean time column)




                                                    3                                     Bottle Rocket Lab
Calculation Table 3: Volume of Water vs. Height of Rocket Flight
               Note: The height that each rocket traveled can be calculated using a fairly simple formula:
                                              Height = 1/2 (gravity) (t2)

                       gravity (g)= 9.8 m/sec2          time(t) = 1/2 the total flight time (T) in sec.


               Sample problem: Total flight time (T) for a rocket is 20 sec. T=20 sec

                                         t=T/2             t=20/2 t=10 sec

                                       Height = 1/2 (gravity) (time2)
                                   Height (m)= 1/2 (9.8m/sec2) (10 sec2)

                                               Height = 490 meters


Volume of       Average
                                                                Height Calculations
 water in      Total Flight            t                                                                      Height
                                                                Height = 1/2 (gravity) (t2)
 rocket         Time (T)             t=T/2                                                                     (m)
                                                                      (show work)
   (ml)           (sec)




                                                            4                                             Bottle Rocket Lab
GRAPHS
      This is scratch paper. After teacher approval design a final draft version. Refer to Rules of
      Graphing Handout for guidelines.

Graph 1: Volume of Water vs. Average Rocket Total Flight Time (T)




Graph 2: Volume of Water vs. Average Height of Rocket Flight




                                                     5                                     Bottle Rocket Lab

								
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