Chemistry Extended Essay Exemplar: Steeping Temperature and Tea… | RevisionDojo

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IB Chemistry SL Extended Essay Example

To what extent do the steeping temperature (50℃, 60℃, 70℃, 80℃, 90℃) and tea processing category (black, white, green) affect the Total Phenolic Content (mg g-1) of the tea (Camellia sinensis var. sinensis) beverage obtained at standardised conditions (1.00 g leaves/100 cm3 water, 5 min brewing time), determined by the Folin-Ciocalteu assay?SL

Official IB Result

IB Grade: A

Criteria A: Focus and Method

6/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Excellent

A.3Research methodology

Excellent

Criteria Feedback

Topic is communicated accurately and effectively with clear purpose and focus throughout.
Research question is clearly stated, well focused and consistently linked to the investigation.
Methodology is exhaustive, replicable and shows clear evidence of informed selection of techniques.

None of significance—only very minor limitations in external validity are acknowledged but do not detract from focus and method.

Criteria B: Knowledge and Understanding

6/6

Criteria Strands

B.1Application of source material

Excellent

B.2Subject knowledge

Excellent

B.3Use of terminology and concepts

Excellent

Criteria Feedback

Consistent and accurate use of advanced subject-specific terminology and concepts.
Authoritative and coherent chemical knowledge, with effective use of primary and secondary sources.
Seamless integration of >70 peer-reviewed sources to support theory, methodology and discussion.

Minor inconsistency in acronym usage (SPLET vs. SPhET) and a small overgeneralisation in one colour attribution point.

Criteria C: Critical Thinking

7/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Good

C.3Discussion and evaluation

Good

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

4/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

Excellent

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Loading scores...

Official IB Result

IB Grade: A

Criteria A: Focus and Method

6/6

Criteria Strands

A.1Topic communication and explanation

Excellent

A.2Research question formulation and focus

Excellent

A.3Research methodology

Excellent

Criteria Feedback

Topic is communicated accurately and effectively with clear purpose and focus throughout.
Research question is clearly stated, well focused and consistently linked to the investigation.
Methodology is exhaustive, replicable and shows clear evidence of informed selection of techniques.

None of significance—only very minor limitations in external validity are acknowledged but do not detract from focus and method.

Criteria B: Knowledge and Understanding

6/6

Criteria Strands

B.1Application of source material

Excellent

B.2Subject knowledge

Excellent

B.3Use of terminology and concepts

Excellent

Criteria Feedback

Consistent and accurate use of advanced subject-specific terminology and concepts.
Authoritative and coherent chemical knowledge, with effective use of primary and secondary sources.
Seamless integration of >70 peer-reviewed sources to support theory, methodology and discussion.

Minor inconsistency in acronym usage (SPLET vs. SPhET) and a small overgeneralisation in one colour attribution point.

Criteria C: Critical Thinking

7/12

Criteria Strands

C.1Research quality

Good

C.2Analysis depth

Good

C.3Discussion and evaluation

Good

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

4/4

Criteria Strands

D.1Structure appropriateness

Excellent

D.2Layout considerations

Excellent

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.