3. The Nature of Science 1 Section 1 What is science?

6. A. Science—a way or a process used to investigate what is happening around you We often see something and wonder “How does that work?” or “Why does that do that?” How would you go about answering those questions?

7. – 1. Scientists observe, investigate, and experiment to find answers. – 2. Scientists also use prior experience to predict what will occur in investigations. – 3. Technology is the application of science to make products or tools that people can use.

8. Who uses science? Scientists Engineers Doctors, nurses, and all professions in the medical field Soldiers Computer designers and programmers The list goes on and on… But most importantly…

9. YOU use science every day!

10. What is Science? Where can you find science or its results? Is science important in your life? Why should you study science?

11. Communication in science – 1. Thousands of scientific journals and magazines report the results and conclusions of experiments every year. – 2. You can also keep scientific data and results in a Science Journal.

12. Skills that are commonly used in science: Observing Measuring Comparing and Contrasting Inferring Interpreting Data Drawing Conclusions Communicating your ideas in a journal

13. Ways to summarize data from an investigation: Use tables, graphs, and charts Make models And if you have access to a computer: Use a word processor Use a database Use an electronic spreadsheet

14. Discussion Question Why might it be important to keep a Science Journal?

15. Scientists usually need to repeat experiments and all the conditions must be the same. Describing the experiment in your Science Journal can help you repeat the experiment. Also, you can write down results, problems, and questions for future consideration.

16. Section 2 Doing Science

17. Remember: “Science is the process used to investigate what is happening around us in order to solve problems or answer questions.” Scientists use scientific methods - ways or steps to follow ( a process), to solve problems. These methods are based on observation, prior knowledge, and research, and experimentation (investigation).

18. A. Scientific methods—ways, or steps to follow, to solve problems B. Descriptive research—answering a scientific question by making observations about the question

19. Steps scientists follow to solve scientific problems… Identify the problem

20. Descriptive research – 1. State the research objective. – 2. Describe the research design, or how you will carry out your investigation. – 3. Eliminate bias, or expected results. –

21. – 4. Select the best materials for the investigation. a. A model represents things that happen too slowly, too quickly, or are too big, small, dangerous or expensive to observe directly. b. Scientists around the world use a system of measurements called the International System of Units to make observations

25. – 5. Design data tables, or ways to accurately record results and observations. – 6. Analyze your data and figure out what your results mean. – 7. Draw conclusions.

27. C. Experimental research design— answering a scientific question by observation of a controlled situation 1. Identify the Problem 2. Form a hypothesis, which is a prediction that can be tested. Educated Guess

28. 3. Plan the experiment. – a. Independent variable—the factor in the experiment that is changed – b. Dependent variable—the factor in the experiment that is being measured – c. Constants—variables that stay the same

30. – 4. Use a control—a sample that is treated like the other experimental groups except that the independent variable is not applied to it. – 5. Conduct several trials of the experiment. – 6. Analyze your results and draw conclusions. – 7. Communicate

32. Section 3 Science and Technology

33. Science and Technology A. Scientific discoveries lead to new products that influence your lifestyle in areas such as: Entertainment Convenience Health

34. 1. Entertainment – a. DVD – b. English and Spanish Dialogue – c. Computers – d. Digital Camera

38. 2. Convenience – a. Hand Held computers – b. Cell Phones – c. Microwave ovens – d. Wireless internet – E. Power and battery tools

41. 3. Health – a. Skin Patch that releases a constant dose of medicine into your body – b. Miniature instruments that allow doctors to operate on unborn babies – c. New computerized machines

44. Olympus Video Gastroscope GIF 160

45. – d. New drug therapy – e. Genetic engineering – Cures and treatment of Genetic diseases

46. B. Technology has made life more Convenient C. Science provides information that people use to make decisions.

47. Discussion Question However, science cannot decide whether the new information is good or harmful, moral or immoral.

48. It is the task of science to answer questions and provide information, but not to decide whether the new information is good or harmful. Can you think of some examples where science has provided information or advancements that people have used in a harmful way?