INQUIRY (DOC download) by izafaqih

VIEWS: 29 PAGES: 6

									                             "Boil water in a bowl of Paper"


I. Objective
       Through this lab students are expected to master the process skills and scientific method.


II. Basic Theory
       Carin and Sund (Mulyasa, 2005: 108) argued that the "inquiry is the process of
  investigating a problem." According Collete and Chiapepetta (1994: 86) "inquiry is the
  process of finding out by searching for knowledge and understanding". In line with this,
  Kuslan and Stone (1969: 138) argued that the "Inquiry That teaching as teaching by which
  Teachers and children study scientific phenomena with the approach and the spirit of the
  scientist".
       The definitions given The National Science Education Standards (Colburn, 2000: 42)
  about the inquiry are: Scientific inquiry refers to the diverse Ways in the which scientists
  study the natural world and propose explanation based on the evidence derived from Their
  Work. Also Inquiry refers to the activities of students in the which They develop knowledge
  and understanding of scientific ideas, as well as understanding of how scientists study the
  natural world.
       Scientific inquiry is defined as a systematic and investigate activity with purpose of
  uncovering and describing relationships among objects and events. It is characterized by thee
  use of orderly, repeatable processes, reduction of the object of investigation to its most simple
  scale and form, and the use of logical frameworks for explanation and prediction. The
  operations of inquiry include observing, questioning, experimenting, comparing, inferring,
  generalizing, communicating, applying and others.
       Some authors believe that, in the secondary schools particularly, inquiry teaching is a
  way of developing the mental processes of curiosity and investigation so that students learn
  how information is obtained.
       Inquiry is the process of defining and investigating problems, formulating hypotheses,
  designing experiments, gathering data, and drawing conclusions about problems. Inquiry
  processes include :
       Originating problems
    Formulating hypotheses
    Designing investigate approaches
    Testing out ideas (e.g., conducting experiments)
    Synthesizing knowledge
    Developing certain attitudes (e.g., objective, curious, open-mided, desires and respects
       theoretical models, responsible, suspends judgment until sufficient data is obtained,
       checks his results).(Leslie W. Trowbridge, 1990: 208-209)
    The learning process is seen as a stimulus that can challenge students to perform learning
activities. Sund and Trowbridge (Mulyasa, 2005: 109) put forward three kinds of inquiry
approach as follows:
   a. Guided Inquiry (guided inquiry); learners acquire in accordance with the ddibutuhkan
       guidelines. These guidelines are usually in the form of guiding questions.
   b. Free Inquiry (free inquiry), on free inquiry learners conduct their own research as a
       scientist.
   c. Free Inquiry is modified (modified free inquiry), the inquiry is the teacher gives the
       problem or problems and then students were asked to solve these problems through
       observation, exploration, and research procedures.
  Syarat benda bisa terbakar adalah (1) ada oksigen ;(2) ada bahan bakar; (3) ada sumber
panas/api; (4)tercapainya titik bakar pada sebuah benda. Jika satu dari ke empat syarat
tersebut tidak ada, maka sebuah benda tidak akan bisa terbakar. Pada kasus air di dalam
kantong plastik. Semua syarat, oksigen, bahan bakar, dan sumber api sudah tersedia, namun
titik bakar plastik tidak bisa tercapai karena “terserap” oleh air yang ada di dalam kantong
plastik. (taken from http://lanibin.millahibrahim.net/?p=196)


III. Tools and Materials
    a. Paper Padalarang white     f. Thermometer
    b. Glue paper                 g. Gauze wire
    c. Ruler                      h. Tripod feets
    d. Scissors                   i. Burner
    e. Stative
IV. Work Steps
    a. Make a bowl-shaped paper cube with size according to the consensus group
    b. Make a tabulation of data to record the experimental data
    c. Write the hypothesis of the experiment your group about this experiment.
        Hypothesis
        ……………………………………………………………………………
        Reason
        …………………………………………………………………………………
   d. Arrange the tools to experiment as the following picture:




   e. Observe the symptoms that arise during the experiment!
   f.   Record observations in tables that have been made (draft tabulation of your group).
   g. Summarize the results of that experiment!


V. Discussion
         Through this lab students are expected the students can master the process skills and
    scientific method. to master the skills of process and scientific method. The experiment
    was conducted with the scientific method, which consists of formulating the problem,
    seeking theory, principles, and research results related to the experiment, formulate a
    hypothesis/ paradigm, test the hypothesis by observation or experiment, draw conclusions
    from the discussion of hypotheses and experimental results. The first was to determine
    the problem, the problem in accordance with the title of which is whether the water to
    boil in a paper cup. Then, look for the theory, principles, and research results related to
    the experiment, his theory is a condition of burning objects there should be oxygen, fuel,
sources of ignition, and fuel the achievement of point objects. When cases of water in the
paper, point fuel requirement is not achieved because the water absorbed in the paper, as
a result of fire does not burn the paper. After searching the theory, the hypothesis that the
water can get boiled with paper cups. The next step, testing the hypothesis by observation
or experiment, in this experiment measures the work done is to first make the two bowl-
shaped paper cube with two sizes, namely 9.5 cm x 8.5 cm x 4.4 cm and 12.3 cm x 10.3
cm x 6.2 cm, and then assemble the appliance in accordance with the picture above, fill
two paper bowls with a volume of 200 ml of water, put a bowl of water on a gauze wire
and measure the initial temperature of water before boiling, turn on the burner to boil
water, and take temperature data every 1 minute until 20 minute. The product can be seen
in the table below
Number       The size of            Start           The temperature of
             cube (cm3)       temperature(˚C)             minute
    1.     12.3X10.3X6.2             26                     1. 33
                                                            2. 38
                                                            3. 42
                                                            4. 44
                                                            5. 48
                                                            6. 53
                                                            7. 55
                                                            8. 54
                                                            9. 57
                                                            10. 57
                                                            11. 59
                                                            12. 59
                                                            13. 60
                                                            14. 59
                                                            15. 60
                                                            16. 62
                                                            17. 61
                                                        18. 59
                                                        19. 56
                                                        20. 54
   2.       10,5X10,5X5            26                1. 35
                                                     2. 39
                                                     3. 44
                                                     4. 49
                                                     5. 52
                                                     6. 53
                                                     7. 53
                                                     8. 54
                                                     9. 56
                                                     10. 56
                                                     11. 53
                                                     12. 53
                                                     13. 53
                                                     14. 53
                                                     15. 52
                                                     16. 49
                                                     17. 49
                                                     18. 47
                                                     19. 46
                                                     20. 45.5

        Berdasarkan data dari tabel di atas dapat dijelaskan bahwa pada kubus I dengan
ukuran 13.3X10,3X6,2 cm3 temperatur awalnya 26oC setelah dipanaskan temperatur yang
dihasilkan pada menit ke-20 menunjukkan 540C. Kertas padalarang yang digunakan
dalam praktkum tidak terbakar dan muncul gelembung-gelembung air mulai pada menit
ke-4 dan air mulai merembes dari awal pemanasan. Air mulai menetes pada menit ke-14
dikarenakan seratnya tidak mampu lagi menahan air.
       Untuk kubus II dengan ukuran 10,5X10,5X5 cm3 dengan temperatur awal sebesar
260C setelah dipanaskan selama 20 menit temperatur maksimal yang dicapai sebesar
560C, kertas padalarang juga tidak terbakar, air merembes mulai dari awal pemanasan
muncul gelembung air pada menit ke-4 dan air menetes pada menit ke-14.
        From the data above, the maximum temperature that can be achieved is 60 oC to
53 oC and the first cube to cube into two, then it can be concluded that increasing the
surface area of a paper bowl, the longer the water is boiling. The final step is to draw
conclusions from the discussion of hypotheses and experimental results, the first
hypothesis is formulated, it was a paper bowl that is used to boil water media can not be
proved, because the temperature reached only up to 62 oC only. And to boil water, the
temperature must reach 100 oC. But the hypothesis that the two can not be proved from
the burning of paper bowls.

								
To top