# Scientific Report Writing

Physics I · Principles of Laboratory Practice · https://tryals.app/learn/physics-i/scientific-report-writing

## Anatomy of a Report

A scientific report communicates your experiment clearly so others can **evaluate** and **reproduce** your work. The **Discussion** section is the most important part because it proves you understand your data, not just that you collected it.

| Section | Purpose & Content |
| --- | --- |
| **Title & Abstract** | Concise description; 1-paragraph aim, method, result summary. |
| **Intro & Method** | Background theory, purpose, equipment, procedure, diagram. |
| **Results & Discussion** | Data tables, graphs, calculations, error analysis. |
| **Conclusion** | Findings with uncertainties (avoid vague "verified" claims). |

**Key distinction:** Never claim vague "human error." Name specific systematic or random sources instead.

## Data & Visuals

Proper formatting separates amateur reports from professional science. Every measured quantity must include its **uncertainty** and SI units.

| Element | Standard Rule |
| --- | --- |
| **Data Tables** | Header with units; value format like $2.34 \pm 0.02$ m. |
| **Figures & Graphs** | Numbered, captioned, and explicitly referenced in text. |
| **Error Bars** | Mandatory on all plotted data points. |

**Common mistakes:** 
- Confusing **precision** (reproducibility) with **accuracy** (closeness to true value).
- Writing conclusions using adjectives instead of numbers: compare measured value $\pm$ uncertainty against accepted values using discrepancy in sigmas.

## Practice questions

8 of this lesson's 13 practice questions, with answers. The full set is in the app.

### 1. Match each section of a scientific report to its content.

**Answer:**

- Introduction → Background theory and purpose of the experiment
- Methods → Equipment, procedure, and conditions
- Results → Data, tables, graphs, and calculated values
- Discussion → Interpretation of results, comparison with theory, error analysis

**Why:** A standard lab report follows the IMRaD structure: Introduction, Methods, Results, and Discussion.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/match-each-section-of-a-scientific-report-to-its-content

### 2. Which should be included in the conclusion of a lab report?

A. The raw data tables
B. Suggestions for improving the experiment
C. A summary of the key numerical results with uncertainties
D. Whether the hypothesis was supported or refuted

**Answer:** B. Suggestions for improving the experiment; C. A summary of the key numerical results with uncertainties; D. Whether the hypothesis was supported or refuted

**Why:** The conclusion summarizes findings and suggests improvements; raw data belongs in the results section.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/which-should-be-included-in-the-conclusion-of-a-lab-report

### 3. Complete the following passage by choosing the correct terms from the word bank.

**Answer:** When presenting a result, you should state the value, its **uncertainty**, and the correct number of **significant** figures.

**Why:** A properly reported result includes the measured value, its uncertainty, and appropriate significant figures.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/complete-the-following-passage-by-choosing-the-correct-terms-from-the

### 4. Sort each item into the correct section of a lab report.

**Answer:**

- Results: Graph of voltage vs current, Table of measured resistances, Calculated slope of best-fit line
- Discussion: Percent error compared to accepted value, Sources of systematic error, Why the result differs from the theoretical prediction

**Why:** Results present data objectively; Discussion interprets and explains.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/sort-each-item-into-the-correct-section-of-a-lab-report

### 5. Assemble the standard structure of a physics lab report, top to bottom.

**Answer:**

1. Abstract, one paragraph: goal, method, headline result with uncertainty
2. Introduction & theory, the equation to be tested
3. Method, apparatus and procedure, reproducible by a peer
4. Results & analysis, data tables, plots, fits, propagated uncertainties
5. Discussion & conclusion, comparison with theory, error sources, verdict

**Why:** The report format is a communication protocol honed over centuries: a busy reader gets the verdict in the abstract, and a skeptical one can descend level by level all the way to raw data. Reproducibility, someone else repeating your method, is the standard the structure serves.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/assemble-the-standard-structure-of-a-physics-lab-report-top-to

### 6. A scientific report must contain enough for another group to repeat the work. Why is that the standard rather than simply reporting the result?

A. Because journals require a fixed structure for consistency
B. Because a result nobody can check is not yet knowledge
C. Because methods sections establish priority over the discovery
D. Because the original group may need to repeat the work themselves

**Answer:** B. Because a result nobody can check is not yet knowledge

**Why:** Checkability is what makes it science rather than testimony. The method section is not documentation of the past, it is the instructions for the test that has not happened yet.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/a-scientific-report-must-contain-enough-for-another-group-to-repeat

### 7. The abstract of a scientific report should be written last, after all other sections are complete.

**Answer:** True

**Why:** The abstract summarizes the entire report, so it is best written after all results and conclusions are finalized.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/the-abstract-of-a-scientific-report-should-be-written-last-after-all

### 8. Complete the statement with the correct term.

**Answer:** The **methods** section of a lab report describes the experimental procedure in enough detail for another scientist to replicate it.

**Why:** The methods (or procedure) section enables reproducibility by detailing all steps, equipment, and conditions.

Page: https://tryals.app/practice/physics-i/scientific-report-writing/complete-the-statement-with-the-correct-term