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1. What is the main purpose of charts, graphs, and tables?

1. What is the main purpose of charts, graphs, and tables?. To show data in a concise and organized way To demonstrate all of the scientist’s hard work To show a model of the scientist’s thinking To make the report look fancy. :26. 2. A scientific theory is.

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1. What is the main purpose of charts, graphs, and tables?

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  1. 1. What is the main purpose of charts, graphs, and tables? • To show data in a concise and organized way • To demonstrate all of the scientist’s hard work • To show a model of the scientist’s thinking • To make the report look fancy

  2. :26 2. A scientific theory is • A rule that uses experimental results and observations to describe a pattern in nature • A scientific explanation of related observations that have been repeatedly tested and shown to be true over time. • A suggested answer to a scientific question • A written account of the purpose of an investigation, the procedure followed, and the results obtained.

  3. 3. Which of the following is a scientist MOST LIKELY to use to determine that a hypothesis is valid? • Data from one experiment that support the hypothesis. • Data from one experiment that do not support a theory accepted by most scientists. • Data collected from many similar experiments that support the hypothesis. • Data collected from many similar experiments that have shown no consistency in results.

  4. 4. You conduct an experiment and find that your data do not support your hypothesis. What should you do? • Change the data to support the hypothesis • Change the hypothesis to one that is supported by the data • Change both the data and the hypothesis • Report the data and conclusion honestly

  5. 5. Which of the following would BEST be used in a laboratory report to show changes in data over a period of time? • A three dimensional model • Circle graph • Line graph • Pie graph

  6. 6. Which situation describes an unsafe laboratory practice? • Pointing a test tube being heated away from people. • Removing a hot container from a burner without gloves or tongs • Keeping your work area neat and organized • Wearing a lab apron and safety goggles when pouring chemicals

  7. 7. Which statement explains how to safely work with chemicals during a lab investigation? • Always smell the chemical if you are not sure what it is. • Never use a chemical from an unlabeled container • Gloves are not needed when you work with chemicals • Goggles only need to be worn when working with chemicals labeled “toxic.”

  8. 8. Scientists often collaborate when seeking the answer to a scientific question. To prevent bias in their work, scientists working to solve the same problem can • Change their hypotheses often. • Change their observations and measurements to support their hypothesis. • Disregard any results that do not support their hypotheses. • Conduct independent studies of the same question.

  9. 9. Which term is used to describe a set of related or connected parts or ideas that work together as a whole? • Machine • Model • System • variable

  10. 10. Which of these statements about a hypothesis is true? • It is valuable only when proved accurate. • It may be valuable even when it turns out not to be completely accurate. • It is determined after a scientist performs his or her initial experiment. • It provides a basis for changing data that are inaccurate.

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