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IB Physics SL/Notes/S2.1 Exploring and designing

IB Physics SLS2.1 Exploring and designingNotes

Anchor Exploring

Exploring is the thinking phase. The goal is not to sound impressive; it is to make a question measurable, justified, and feasible.

Start with an observable physics phenomenon or problem.
Use background theory to identify a relationship worth testing.
A focused research question names the independent and dependent variables.
The question should be narrow enough to investigate with available time and equipment.
A strong question suggests a prediction or model for comparison.

Repair exploring-stage investigation ideas.

Spot Errors

Develop a focused physics research question.

Choosing a broad theme rather than a testable relationship.

Develop a focused physics research question.

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Practice Designing investigations

A strong design lets someone else repeat the investigation and understand why each choice was made.

A design should say what is changed, measured, and controlled.
Apparatus should match the precision and range needed.
Choose a range and interval spacing that can reveal the expected relationship.
Plan repeats and averaging before data collection.
Include a raw data table structure and processing plan.
Include safety and ethical considerations.

Repair investigation design weaknesses.

Spot Errors

Design a physics investigation method.

Writing steps without justification.

Design a physics investigation method.

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Practice Controlling variables

Practice

Control variables are a validity argument. Name the factor, explain why it matters, and say exactly how you control or monitor it.

A controlled variable is a factor that could affect the dependent variable but is not the independent variable.
Controls should be chosen from physics reasoning, not copied from a generic list.
For each control, state the method used to keep it constant or measure it.
If a variable cannot be fully controlled, monitor it and discuss its impact.
Poor control reduces validity because changes in the dependent variable may have another cause.

Repair controlled-variable statements.

Spot Errors

Explain how controlled variables support validity.

Listing controls without method or reason.

Explain how controlled variables support validity.

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Retrieve the Exploring and designing Model

Review

This summary checks whether an investigation is ready to run. If the question, variables, controls, or processing are unclear, the design needs revision.

Exploring starts from a phenomenon and turns it into a focused research question linked to theory.
A research question should identify independent and dependent variables.
Designing chooses apparatus, range, intervals, repeats, and data tables.
Controls must be relevant, justified, and managed by specific methods.
The design should include processing, uncertainty, safety, and ethical planning before data collection.

Match each design-stage cue to its role.

Match
Reasons
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Summarize the exploring and designing stage of a physics investigation.

Jumping from topic to apparatus without a research question.

Summarize the exploring and designing stage of a physics investigation.

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