Difficulty: Medium

Average Score: 64%

A student mixes 100 g of chemicals in a beaker and bubbles form. After the bubbling stops only 50 g of chemicals remain. The student knows that matter is subject to a conservation law, and cannot be created or destroyed. The student wants to use the scientific method to explain this discrepancy.

What is the student's next step?

Rationale

Analyze the experimental design to ensure it is a valid test of the law, and then repeat the valid test.

The student must evaluate their experimental setup to determine if the observed loss of mass is due to an error or a legitimate phenomenon. By ensuring the experiment is valid and repeating it, they can accurately apply the law of conservation of mass.

A (Change the results so that they agree with the law of conservation of mass) YOUR ANSWER

Falsifying results undermines the integrity of scientific inquiry. Scientists must seek an accurate understanding of phenomena rather than altering data to conform to established laws. This choice disregards the fundamental principles of scientific ethics and methodology.

B (Ignore the law of conservation of matter, as it does not apply in this situation) YOUR ANSWER

The law of conservation of mass is a fundamental scientific principle that applies universally, including in this scenario. Ignoring it would lead to a misunderstanding of basic scientific concepts and hinder the learning process.

D (Discard the law of conservation of matter because this experiment proves it is wrong) YOUR ANSWER

Concluding that the law is incorrect based on a single experiment is scientifically unsound. Laws of nature are established through repeated, validated observations, and one anomalous result should prompt further investigation, not outright dismissal.

Conclusion

The student's next step should be to critically assess the experimental design and repeat the test to ensure it accurately reflects the principles of the law of conservation of mass. This approach encourages a deeper understanding of the scientific method and reinforces the importance of empirical validation in science. By doing so, the student can uncover the reasons behind the unexpected results while respecting established scientific laws.

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