IB Physics SL S2.3 Concluding and Evaluating Questions

Practise IB Physics SL S2.3 by drawing evidence-based conclusions, identifying limitations and proposing realistic improvements.

Exam points

identify valid measurements, controls, uncertainty and evidence relevant to an investigation
process data with graphs, trends and relationships to reach a justified conclusion about a hypothesis
evaluate errors, limitations, reproducibility and realistic improvements using the experimental evidence

Covered syllabus points

S2.3.1—Concluding S2.3.2—Evaluating

[Maximum number: 1]

A satellite powered by solar cells directed towards the Sun is in a polar orbit about the Earth.

The satellite is orbiting the Earth at a distance of 6600 km from the centre of the Earth.

Not all scientists agree that global warming is caused by the activities of man. Outline how scientists try to ensure agreement on a scientific issue.

[Maximum number: 1]

The graph shows the plotted data for this experiment. Uncertainties in the data are not shown

State one reason why the results of the experiment could not be used to predict the natural frequency of oscillation for girders of height 50 m .

[Maximum number: 2]

A student is running an experiment to determine the acceleration of free-fall g. She drops a small metal ball from a given height and measures the time t taken for it to fall using an electronic timer. She repeats the same experiment several times.

With the collected data she determines the value of g to be $(10.4 \pm 0.7) \mathrm{m} \mathrm{s}^{-2}$ . Researching scientific literature about the location of her experiment she finds the value of g to be $(9.807 \pm 0.006) \mathrm{m} \mathrm{s}^{-2}$ . State, with a reason, whether her experiment is accurate. provided.

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Covered syllabus points

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