Biology IA Exemplar: How does change in temperature… | RevisionDojo

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IB Biology HL Internal Assessment Example

How does change in temperature 25.0°C,35.0°C,45.0°C,55.0°C , 65.0°C ±0.5°C affect the rate of catalase activity extracted from Musa acuminata (Banana),measured by the volume in cm3(±1) of oxygen gas produced from the decomposition of 10ml(±1.0 ) of 6% hydrogen peroxide for a period of 5 minutes, using a gas syringe?HL

Official IB Result

IB Grade: 7

Criteria A: Research Design

6/6

Criteria StrandsPro

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Moderate

Criteria Feedback

The student framed the investigation in a clear, specific biological context and operationalised the question well.
The student's background shows good scientific understanding of why temperature affects catalase activity.
The student included several relevant controls and a method detailed enough to follow in broad terms.

The method is not fully reproducible because some steps are ambiguous and the trial structure is inconsistent.
A key variable, pH, is not controlled or explained.
The justification for the time endpoint could be stronger if the student measured initial rate instead.

Criteria B: Data Analysis

6/6

Criteria StrandsPro

B.1Communication of data recording and processing

Moderate

B.2Consideration of uncertainties

Moderate

B.3Data processing quality

Moderate

Criteria Feedback

The student recorded repeated measurements and summarised them with means and standard deviations.
The student's graphs and statistical test help show the overall temperature pattern clearly.
The student showed awareness of uncertainty through apparatus values, spread in replicates, and later discussion of limitations.

Some terminology is imprecise, especially describing the measured volume as a percentage yield.
The uncertainty treatment is not fully rigorous and some calculations are not well justified.
The analysis would be stronger if the student focused on initial rate rather than a single five-minute endpoint.

Criteria C: Conclusion

6/6

Criteria StrandsPro

C.1Conclusion relevance and consistency

Moderate

C.2Scientific context comparison

Moderate

Criteria Feedback

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Criteria D: Evaluation

3/6

Criteria StrandsPro

D.1Methodological weaknesses

Good

D.2Improvements

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.

Loading scores...

Official IB Result

IB Grade: 7

Criteria A: Research Design

6/6

Criteria StrandsPro

A.1Research question context

Excellent

A.2Methodological considerations

Good

A.3Methodology description

Moderate

Criteria Feedback

The student framed the investigation in a clear, specific biological context and operationalised the question well.
The student's background shows good scientific understanding of why temperature affects catalase activity.
The student included several relevant controls and a method detailed enough to follow in broad terms.

The method is not fully reproducible because some steps are ambiguous and the trial structure is inconsistent.
A key variable, pH, is not controlled or explained.
The justification for the time endpoint could be stronger if the student measured initial rate instead.

Criteria B: Data Analysis

6/6

Criteria StrandsPro

B.1Communication of data recording and processing

Moderate

B.2Consideration of uncertainties

Moderate

B.3Data processing quality

Moderate

Criteria Feedback

The student recorded repeated measurements and summarised them with means and standard deviations.
The student's graphs and statistical test help show the overall temperature pattern clearly.
The student showed awareness of uncertainty through apparatus values, spread in replicates, and later discussion of limitations.

Some terminology is imprecise, especially describing the measured volume as a percentage yield.
The uncertainty treatment is not fully rigorous and some calculations are not well justified.
The analysis would be stronger if the student focused on initial rate rather than a single five-minute endpoint.

Criteria C: Conclusion

6/6

Criteria StrandsPro

C.1Conclusion relevance and consistency

Moderate

C.2Scientific context comparison

Moderate

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: Evaluation

3/6

Criteria StrandsPro

D.1Methodological weaknesses

Good

D.2Improvements

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.