When performing an experiment what should be done

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

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? A. B. C. D. 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

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

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

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

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? A. The location of the birdhouses B. The number of birds in each bird house C. The size of the birdhouse D. The season of the year And the answer is…… C

What is the difference between a scientific question and a non-scientific question? A. B. C. D. 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

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

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

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

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

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? A. B. C. 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 D. Experimental results must be reproducible to be accepted as valid science. And the answer is…… D