Science Unit 4 — Data Science ⏱ ~25 min Checkpoint 3

Checkpoint 3

Review the key ideas from Lessons 11-15, then test yourself with 10 multiple-choice questions and 3 short-answer questions.

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Quick Review

Claims, Evidence and Reasoning

Focus: A claim is a statement or conclusion that answers a scientific question. Reasoning explains why the evidence supports the claim using scientific principles.

Key terms: Claim, Evidence, Reasoning

Evaluating Data Quality

Focus: High-quality data is reliable, valid and sufficient to support a conclusion. Bias and error can reduce data quality at any stage of collection and analysis.

Key terms: Data quality, Reliability, Validity

Communicating Findings Clearly

Focus: Scientific communication must be clear, logical and appropriate for the audience. Good communication allows others to repeat, evaluate and extend your work.

Key terms: Scientific report, Abstract, Method

Mini Data Investigation

Focus: A mini investigation requires a clear question, a fair test and systematic data collection. Planning before collecting data saves time and improves the quality of results.

Key terms: Investigation, Hypothesis, Fair test

Unit Synthesis and Depth Study Preparation

Focus: A depth study is an extended independent investigation requiring planning, execution and communication. Successful depth studies depend on thorough planning, honest data handling and clear communication.

Key terms: Depth study, Synthesis, Independent investigation

Multiple Choice (10 questions)

1. Which component of a scientific argument explains why the evidence supports the claim?

AThe claim

BThe evidence

CThe reasoning

DThe hypothesis

2. A student says 'The metal expanded because heat increases particle vibration.' What part of CER is 'heat increases particle vibration'?

AClaim

BEvidence

CReasoning

DConclusion

3. Which best describes valid data?

AData that is consistent when repeated

BData that measures what it claims to measure

CData collected by a famous person

DData that supports your hypothesis

4. Why is peer review important for scientific data?

AIt makes the data longer

BIt allows other experts to check methods and conclusions

CIt guarantees the data is correct

DIt reduces the need for graphs

5. Which section of a scientific report tells others how to repeat the experiment?

AAbstract

BMethod

CDiscussion

DConclusion

6. Why should scientific conclusions use cautious language like 'suggests' rather than 'proves'?

AIt sounds more intelligent

BScientific evidence usually supports rather than absolutely proves a conclusion

CIt makes the report shorter

DIt is required by law

7. What is the first step in any scientific investigation?

AMaking a graph

BWriting a conclusion

CAsking a clear, testable question

DBuying equipment

8. Why is it important to decide on controlled variables before starting data collection?

AIt makes the experiment more expensive

BIt ensures the test is fair and the cause of any effect can be identified

CIt reduces the number of measurements needed

DIt makes the hypothesis easier to write

9. What distinguishes a depth study from a regular practical lesson?

AIt is shorter

BIt requires independent design and management of the investigation

CIt does not need a hypothesis

DIt only involves reading

10. Why is a project timeline important for a depth study?

AIt makes the report look professional

BIt helps manage time across multiple stages and prevents last-minute rushing

CIt reduces the amount of data needed

DIt guarantees better results

Short Answer (3 questions)

SA1

Explain the claim-evidence-reasoning framework and why all three components are necessary for a strong scientific argument. (5 marks)

Write your answer in your book.

SA2

Define reliability and validity, and explain why both are necessary for high-quality scientific data. Include an example where data might be reliable but not valid. (5 marks)

Write your answer in your book.

SA3

Describe the purpose of each section in a standard scientific report and explain how the sections work together to communicate findings. (5 marks)

Write your answer in your book.

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