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Scientific Method in Practice: Troubleshooting Experiments

Learn how to handle data that doesn't support your hypothesis. Explore best practices in data collection and hypothesis formulation in various scientific scenarios.

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Scientific Method in Practice: Troubleshooting Experiments

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  1. When performing an experiment, what should be done if the data DO NOT support the hypothesis? • Check for errors and run the experiment again • Change the hypothesis to match the conclusion • Change the variable so the data will match the hypothesis • Ignore the data and present the results anyway And the answer is….. A

  2. A group of students is investigating how long it takes for mold to grow on slices of bread at different temperatures. Which is the best means of collecting data? • Check each piece of bread for mold once a week • Check each piece of bread daily until mold appears • Check the warm bread daily, the cool bread weekly • Check only the warm bread daily since the cool bread is a control And the answer is……. B

  3. Which question cannot be answered by science? • Which birds fly north in the spring? • Which planet is the most interesting? • How fast will a salt crystal dissolve? • Why does the seafloor spread? And the answer is…… B

  4. Which of the following statements is a scientific hypothesis? • Flossing has proven to be an effective method of improving oral health • Many infectious diseases, such as gum disease, are caused by microorganisms • In general any method that reduces bacteria in the mouth will improve oral health • An individual who flosses daily will be less likely to get gum disease than one who flosses weekly And the answer is…. D

  5. Which correctly arranges three scientific terms – theory, law, hypothesis – from LEAST to MOST accepted or tested? • Theory, hypothesis, law • Hypothesis, law, theory • Theory, law, hypothesis • Hypothesis, theory, law And the answer is…… D

  6. A student hypothesized that robins prefer large birdhouses. To test this, he built four birdhouses of different sizes. What was the independent variable in the student’s study? • The location of the birdhouses • The number of birds in each bird house • The size of the birdhouse • The season of the year And the answer is…… C

  7. What is the difference between a scientific question and a non-scientific question? • A scientific question will produce a claim that can be tested • A science question may have more than one right answer • A scientific question cannon produce useful knowledge • A scientific question can only be answered by a professional scientist And the answer is…… A

  8. Which BEST describes why scientific knowledge changes over time? • Scientist change their minds about natural processes • Science must explain new observations that challenge existing theories • As natural laws change, scientific knowledge must change with them • Scientific knowledge is a set of opinions, and opinions change over time And the answer is…… B

  9. Which is a true statement regarding the graphing of data? • It is always better to leave data in a table than to graph it • Bar graphs are the best type of graphs for scientific data • For any given set of data, there is only one correct graph or way to display it • Data can be displayed in many types of graphs in order to show different things about the data And the answer is…… D

  10. Which BEST describes a hypothesis? • It is a law that has been proven true • It is a claim that can be tested • It is an opinion of a scientist • It is a description of an event And the answer is…… B

  11. Jasmine wants to determine if crayfish prefer light or dark areas. What is the first step she should take in conducting a scientific inquiry? • Graph the data • Make a hypothesis • Collect the data • Write a conclusion And the answer is…… B

  12. In 1999 a team of researchers claimed that it had made a new element. Two other research teams repeated the experiment but could not reproduce the results. The original team retracted their claim. What do these events say about scientific inquiry? • If one team makes a finding, other teams will try to prove them wrong • It was impolite for the other teams to question the first team’s results • Physical laws change over time, so researchers cannot always replicate results • Experimental results must be reproducible to be accepted as valid science. And the answer is…… D

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