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Questions and Answers
A hypothesis is an uneducated guess that tries to answer a question.
A hypothesis is an uneducated guess that tries to answer a question.
False
Qualitative data includes numerical measurements like height and weight.
Qualitative data includes numerical measurements like height and weight.
False
The control group in an experiment is the group that is subject to change.
The control group in an experiment is the group that is subject to change.
False
Random error affects the accuracy of measurements but does not affect their precision.
Random error affects the accuracy of measurements but does not affect their precision.
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The process of scientific inquiry requires collecting data to establish results.
The process of scientific inquiry requires collecting data to establish results.
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Study Notes
Glossary
- Hypothesis: An educated guess that attempts to answer a question (what you think might be true)
- Data: Information gathered through an investigation.
- Quantitative Data: Data that involves numbers (e.g., minutes, height, weight)
- Qualitative Data: Data that involves descriptive words or phrases (e.g., passed, failed)
- Vetting the data: Evaluating if the data is related to the claim being investigated.
IDEA
- Identify the question
- Determine the investigation methods
- Establish the results
- Assess the conclusion
Checking Conclusions
- Does the conclusion contain unsupported claims?
- Does the conclusion focus on only some of the results?
- Does the conclusion misinterpret any results?
- Does the conclusion emphasize minor details while neglecting major details?
Elements of Experimental Design
- Variable: A factor that can change during an investigation
- Unexpected Variable: A change that was not anticipated
- Dependent Variable: The factor that is expected to change in response to other factors
- Experimental Group: The group being studied
- Control Group: The group used for comparison, which is not changed.
Verifying Accuracy in Scientific Investigations
- Repeatable, Reliable, and Consistent: Investigations should produce similar results consistently.
- Scientific Consensus: Agreement amongst scientists on a certain answer
- Systematic Error: Errors that affect the accuracy of measurements.
Accuracy and Precision
- Equipment Problems: Equipment issues may cause consistent but incorrect results.
- Random Errors: Errors that affect the precision of measurements
- Inconsistent Results: Results may vary between trials even if performed similarly. To address inconsistent data, gather more data and average the measurements.
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Description
Test your understanding of key concepts in experimental design such as hypothesis formulation, data types, and evaluation of conclusions. This quiz will challenge you to apply the steps of the IDEA and identify the elements involved in designing an investigation.
