IB Exploration Practice 3

We have previously discussed the correlation between carbohydrates and obesity in humans; in Biology you also examined the effects of dietary changes on mice.  Purposefully altering diets of human for scientific purposes is not an ethical practice, but using another mammalian species, such as rats or mice (these species are often used in labs to analyze the effects of a variety of conditions before human testing), provide a means to examine changes on an organism.  

For this activity you are to design a lab to test the following question: Does a change in diet affect rat/mouse behavior?

Defining the Research Question:

In the question above there are five underlined words. These words are underlined because they are not clear enough to make a good starting point for a lab design. Before you can design the lab you must improve the question. You are required to fix the problem statement above by first defining precisely the underlined words.

Define is a command term that means to give a precise meaning of a word, phrase of physical quantity. It is sometimes helpful with a definition to provide an example if possible.  This does not mean you need to give definitions of the following words, but rather in your hypothesis be very specific in what each of these means.  For example, be specific in how you will measure rat behavior.

Rewrite the problem statement as a research question. Use the precise meanings you have developed.

Outlining the Procedure & Stating Variables

The command term outline requires you to give a brief outline or summary, while state asks you to give a specific name, value or other brief answer without explanation or calculation. Describe requires you to give a detailed account.

It is suggested, highly, that composer your question so that you meet the following conditions: At minimum, you should use 5 different variants of your independent variable and 5 trials for each variant, “Five by Five Rule.”

Example Format of Design Write-Up

For assistance and reminders for the correct format of the above components, review the IB Scientific Method presentation.

Turn In:

Create a new google document shared between group members and turn in via Google Classroom.

Assessment, Exploration:

This criterion assess the extent to which the student establishes the scientific context for the work, states a clear and focused research question and uses concepts and techniques appropriate for the Diploma Program level.  Where appropriate, this criterion also assesses awareness of safety, environmental, and ethical considerations.

IB Mark

TuHS Mark

Descriptor

5-6

Exceeds (4)

  • The topic of the investigation is identified and a relevant and fully focused research question is clearly described.
  • The background information provided for the investigation is entirely appropriate and relevant and enhances the understanding of the context of the investigation.
  • The methodology of the investigation is highly appropriate to address the research question because it takes into consideration all, or nearly all, of the significant factors that may influence the relevance, reliability and sufficiency of the collected data.
  • The report shows evidence of full awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation.

3-4

Meets (3)

  • The topic of the investigation is identified and a relevant but not fully focused research question is described
  • The background information provided for the investigation is mainly appropriate and relevant and aids the understanding of the context of the investigation
  • The methodology of the investigation is mainly appropriate to address the research question but has limitations since it takes into consideration only some of the significant factors that may influence the relevance, reliability and sufficiency of the collected data
  • The report shows evidence of some awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation*

1-2

Nearly Meets (2)

  • The topic of the investigation is identified and a research question of some relevance is stated but it is not focused
  • The background information provided for the investigation is superficial or of limited relevance and does not aid the understanding of the context of the investigation
  • The methodology of the investigation is only appropriate to address the research question to a very limited extent since it takes into consideration few of the significant factors that may influence the relevance, reliability and sufficiency of the collected data
  • The report shows evidence of limited awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation.

0

Beginning (1)

            The student’s report does not reach a standard described by the descriptors above.

Exploration Further Explanation: