1 / 27

KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence.

Explore biology as a process of inquiry, from making systematic observations to conducting experiments, testing hypotheses, and using theories supported by scientific evidence. Understand the importance of clear communication among scientists. Learn how to ensure the reliability and validity of experiments. Prepare for a Quick Quiz on scientific methodologies.

eddyp
Download Presentation

KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. KEY CONCEPTScience is a way of thinking, questioning, and gathering evidence.

  2. Objectives from section 1-3 (pg 15) • Elaborate on how biology is a process of inquiry • Explain why biologists use experiments to test hypotheses • Define and give examples of a theory • Specify the importance of communication among scientists

  3. Like all science, biology is a process of inquiry. • Scientists make careful and systematic observations • Use known facts • Use your senses • Scientists record observations as data • Can be qualitative (descriptive) or quantitative (amounts)

  4. Like all science, biology is a process of inquiry. • Scientists form a hypothesis as a possible answer to a question. • Testable (and repeatable) explanation of a situation • “If…then…because…”

  5. Like all science, biology is a process of inquiry. • Scientists test their hypotheses and analyze their data.

  6. Biologists use experiments to test hypotheses. • Observational studies allow scientists to describe a phenomenon. • Inferences combine what you know with what you have learned • Your turn!

  7. Experiments allow scientists to determine what causes a phenomenon. -Control group: used for comparison -Experimental group: exposed to factor being tested -Constants are conditions that are kept the same.

  8. Experimental studies allow scientists to determine what causes a phenomenon. • Independent variables are manipulated. (If….) • Dependent variables are observed and measured. (then…)

  9. A theory explains a wide range of observations and experimental results. • Supported by a wide range of scientific evidence. • Can change based on new evidence. New evidence shows that ulcers are caused by bacteria.

  10. Does exist? -Yes? No? -ALWAYS a chance that some unknown factor contributed to result/conclusion of experiment -Making sure experiment is reliable and valid is as close as we can get to providing “proof”

  11. Reliability -Experiment must be repeatable -Others must be able to repeat experiment with the same results -Replicating results is cornerstone of scientific research -Experiments that are difficult to repeat or replicate are less reliable. -Methods/steps should be explicit and detailed to make it more reliable.

  12. Validity -Are your findings credible? Does your experiment test what you say it does? -Established if experiment meets all requirements of scientific method and experimental design. -Did you include a control group? -Did you randomize your sample? -Did you keep other factors constant?

  13. Validity vs. Reliability

  14. Quick Quiz Time  • Each question will be worth 2 points • You may NOT talk and/or communicate with a classmate • Scores will be collected and recorded at the end of the chapter

  15. 10. Which word best describes a scientific hypothesis? • Provable • Theoretical • Testable • quantifiable

  16. 11. At which stage of scientific inquiry would scientists find out if their hypotheses were supported by their data? • Observing • Testing hypotheses • Analyzing data • Evaluating results

  17. 12. In an experiment, the condition that is manipulated by a scientist is the • Independent variable • Dependent variable • Constant • Control condition

  18. 13. Which of the following is an important characteristic of a scientific theory? • Proven by more than one scientist • Unchanged by new evidence • Accepted by the public • Supported by much evidence

  19. 14. Reliability refers to an experiment being repeatable and allowing different results. • True • False

  20. Trade your paper with a non-lab partner

  21. 10. Which word best describes a scientific hypothesis? • Provable • Theoretical • Testable • quantifiable

  22. 11. At which stage of scientific inquiry would scientists find out if their hypotheses were supported by their data? • Observing • Testing hypotheses • Analyzing data • Evaluating results

  23. 12. In an experiment, the condition that is manipulated by a scientist is the • Independent variable • Dependent variable • Constant • Control condition

  24. 13. Which of the following is an important characteristic of a scientific theory? • Proven by more than one scientist • Unchanged by new evidence • Accepted by the public • Supported by much evidence

  25. 14. Reliability refers to an experiment being repeatable and allowing different results. • True • False Must have SIMILAR results with each trial

  26. End of show!

More Related