1 SCIENCE: A Way of Knowing I. The Role of Science: A. Making Choices 1. What gasoline to buy 2. What shampoo is best for my hair 3. What pain relievers work for me 4. Apply same thought process when we want to learn about a star or a living cell.

2 SCIENCE: A Way of Knowing B.Why study science? Newspaper headlines – weather, environmental issues, earthquakes Powerful tool to understand how our world works and how we interact with our physical surroundings Represents our best hope for predicting and coping with natural disasters, curing diseases, discovering new technologies Better prepared to incorporate these advances in your professional life and better understand process by which such advances are made Consumer, tax payer, living being, parent

3 SCIENCE: A Way of Knowing The Scientific Method Observation Plato believed that only through the mind can we arrive at reason and truth Observing nature without manipulating it (ex. Astronomer) Experiment – manipulating some aspect of nature and observing the outcome (ex. Chemist) Identifying Patterns and Regularities Repeated observations – start to recognize patterns Results of observations summarized in mathematical form Ex. Falling object

4 SCIENCE: A Way of Knowing Mathematics, the Language of Science Concise language that allows them to communicate their results in compact form and allows them to make precise predictions about expected outcomes of expts. Or observations Hypothesis and Theory Hypothesis – educated guess Theory – description of the world that covers large number of phenomena and has met many observational and experimental tests Prediction and Testing A guess about how a particular system will behave followed by observation to see if the system behaved as expected within a specified range of situations Every theory and law of nature is subject to change, based on new observations

5 SCIENCE: A Way of Knowing The Scientific Method in Operation Endless cycle – observations lead to hypothesis which lead to more observations Scientists are not required to observe with an “open mind” There is no right place to enter the cycle Observations and experiments must be reported in a way that results can be verified (reproducible) Cycle is continuous The Ongoing Process of Science: Biodiversity Biodiversity – number of different species that coexist at a given place

6 SCIENCE: A Way of Knowing Science in the Making: Dimitri Mendeleev and the Periodic Table Chemistry professor at Technological Institute of St. Petersburg, Russia, developed the periodic table in 1869 Arranged list of elements (63) by increasing atomic weights He realized that elements with similar chemical properties appeared at regular or periodic intervals. The Science of Life: William Harvey and the Blood’s circulation He gave us our current picture of the pattern of circulation. Blood is pumped from the heart to the body through arteries and returned to heart through veins.

7 SCIENCE: A Way of Knowing Other Ways of Knowing Different Kinds of Questions The scientific method is not the only way to answer questions. What is the meaning of life? Is there a God? What career should I choose? Pseudoscience A kind of inquiry falling in the realm of belief or digma which includes subjects that cannot be proved or disproved. Ex: UFO’s, Astrology, ESP

8 SCIENCE: A Way of Knowing Science by the Numbers: Astrology Belief that positions of objects in the sky at a given time (ex. Person’s birth) determine a person’s future. The Organization of Science The Divisions of Science Field researchers – observe nature at work Experimentalists – manipulate nature with controlled expts. Theorists – spend their time imagining universes that might exist.

9 SCIENCE: A Way of Knowing The Branches of Science Physics – search for laws that describe matter, energy, forces, motion, heat, light Chemistry – study of atoms in combination Astronomy – study of stars, planets and other objects in space Geology – study of origin, evolution and present state of earth Biology – study of living systems The Web of knowledge Intricate spider web

10 SCIENCE: A Way of Knowing Basic Research, Applied Research, Technology Basic Research – finding out how the world works; in knowledge for its own sake Applied Research – develop technology in which they apply results of science to specific commercial or industrial goals R & D – ideas developed by applied research translated into practical systems Technology transfer – large-scale production

11 SCIENCE: A Way of Knowing Search for Extraterrestial Intelligence Funding for Science Table 1-3 Federal budget for R & D in 2002 was 100 billion dollars Scientists seeking for research submit grant proposals A proposal has about a 10% to 40% chance of being successful depending on the subject

12 SCIENCE: A Way of Knowing Communication Among Scientists Scientific meetings Journals, publications Scientists submit papers to publish results of their research Journal editor sends manuscript to a panel of reviewers which are scientists that are experts in that field Usually send back with a list of modifications and corrections This process is known as peer review.