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The Laboratory Write-Up

The Laboratory Write-Up. What is it? What do I need to hand in?. Science Inquiry. Why do we complete labs? To answer a question. A Law describes a condition that has been observed so consistently that scientists are convinced it will always happen. Components to a Laboratory Write-Up.

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The Laboratory Write-Up

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  1. The Laboratory Write-Up What is it? What do I need to hand in?

  2. Science Inquiry • Why do we complete labs? • To answer a question. • A Law describes a condition that has been observed so consistently that scientists are convinced it will always happen.

  3. Components to a Laboratory Write-Up • Title • Purpose/Problem • Hypothesis • Materials/Apparatus • Procedure • Observations • Conclusion • Discussion

  4. Title & Purpose • Title • Definitive outline as to what your lab was actually about. • Determining differences in rates of reaction due to variable changes with respect to surface area, temperature and concentration. • Purpose • Statement of purpose, or aim: why is the experiment being done?

  5. Hypothesis • Hypothesis – is an IF…THEN…BECAUSE statement. • Ifthe surface area of the tablet is increased, then the rate of reaction between the tablet and the water will be more rapid because there is more tablet exposed to the water.

  6. Materials/Apparatus • Usually will make a list to refer to what was used for the experiment in which you are attempting to answer a question. • Sometimes we will use lists and/or diagrams. • Sometimes will write: See Ritter et al. Science 10. Nelson. 2001. p. 1-2. • The following changes were made: • List the changes

  7. Procedure • Step by step process in which you outline exactly what you did in your experiment in an attempt to answer your question. • You are looking to either prove your hypothesis right or wrong. • A numerical or alphabetical listing of instruction. • No abbreviations. • Written in the third person (do not use I). • Passive past tense. • Main points only. • Sentence form.

  8. Variables • Variables • Each factor that may determine the outcome of an investigation. • All variables must be controlled when completing an investigation except one. • Changing variable = independent variable • Unchanging variable = dependent variable • Control = treatment or experiment that you can compare with the results of your test groups.

  9. Observations • What did you see when you completed your lab in the attempt to answer your question? • Include both qualitative and quantitative observations in your write-ups. • Tables are the preferred organization method of data collected.

  10. Conclusions • Come directly from your observations and should support or falsify your hypothesis. • Do not forget to restate the hypothesis that you are supporting or falsifying. • A hypothesis is not “sort of” correct, it is either correct or it is not based on what you have observed.

  11. Discussion • Quite commonly this will be Analysis questions from the text. • However, some things to keep in mind: • Ways experiment could have been refined. • Sources of error. • Knowledge shared that could help explain the conclusion further.

  12. Evaluation • Each section outlined has marks associated with it and these are broken into the different KICA categories. • The amount of work associated with a section and/or number of questions will determine the number of marks allotted.

  13. Evaluation • Knowledge • Title, Observations, Conclusion • Application • Discussion • Inquiry • Prelab, Problem, Hypothesis, Materials, Procedure • Communication • Level based on spelling and grammar

  14. Rate of Reaction Mark Breakdown • Title – K1 • Problem – I1 X 3 = I3 • Hypothesis – I3 X 3 = I9 • Apparatus – I1 X 3 = I3 • Materials – I1 X 3 = I3 • Procedure – I5 X 3 = I15 • Observations – K2 X 3 = K6 • Conclusion = K2 X 3 = K6 • Discussion • Q. 1 - Graph (A3) X 3 = A9 • Q. 2 = A1 • Q. 3 = A3 Totals K = 13 A = 13 I = 30 C = Level out of 4

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