1 / 16

The Science of Biology: Understanding the Natural World

Explore the foundations of science, from investigating the natural world to developing hypotheses and conducting experiments. Learn how scientists think, work, and test theories for a deeper understanding of biology.

brittani
Download Presentation

The Science of Biology: Understanding the Natural World

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. Chapter 1The Science of Biology Section 1:1 What is Science?

  2. I. Science goals • A. Investigating and understanding the natural world, in an organized way. • Science uses evidence from testing, collecting, organizing, connecting, observing and examining, to learn about the natural world.

  3. II. Thinking like a scientist • Whenever a scientist begins research he/she usually begins to compile information in a very organized fashion. • Data- gathering information in 2 different ways. • Quantitative – data expressed in numbers, obtained by counting and measuring • Qualitative – descriptive, involves characteristics that usually cannot be counted. • Inferences – logical interpretation based on prior knowledge or experience. It’s like an assumption of what you think. (testing a body of water)

  4. B. Explaining and interpreting evidence. • After a scientist’s initial observation they will propose one or more hypothesis. • Hypothesis- a proposed scientific explanation for a set of observation, that can be TESTED. • Generate this by using: • Prior knowledge ( already know) • Logical inference • Informed, creative imagination • (Could be competing)

  5. Science: as a way of knowing • Science is an ongoing process that is constantly changing. • Scientist are skeptics, questioning existing ideas and new hypothesis. • Scientific way is to view that the whole physical universe is a system or a collection of parts and processes that interact, and it contains small systems within it. • Biologist concentrate on the living systems, from invisibly small to the size of an entire planet.

  6. Chapter 1 • Section 1:2

  7. Section 1-2 How Scientists Work • I. Designing an experiment • 1. Ask a question/problem? Where did life come from? • 2. Forming a hypothesis: • Spontaneous Generation? • Life from non living things. • Maggots arose from the meat • Mice arose from the rice • Earthworm from the rain

  8. Redi’s experiment on Spontaneous Generation, Where do maggots really come from?

  9. Controlled Experiment: This type of experiment is using variables and only one variable can change. All others should be kept unchanged or CONTROLLED.

  10. Variables – factor that can change in an experiment • Equipment, material, amount of material, temperature, light and time.

  11. Manipulated variable – (Independent)- the variable that is deliberately changed. b. Responding variable – (Dependent) - the variable that is observed and changes in response to the manipulated variable.

  12. So in Redi’s experiment: • the manipulated variable would be, whether or not there was gauze over each jar. • The responding variable would be whether the maggots appeared.

  13. D. Recording and Analyzing Results • Keeping records of all the observations and data during the experiment. • This is more accurate than a verbal explanation.

  14. Drawing a Conclusion • Use the data, evidence from the experiment to evaluate the hypothesis, and draw a valid conclusion. • This way they can determine whether the hypothesis is supported or refuted.

  15. III. How a Theory Develops A. A well tested explanations and observations that are thought to be true, but could change.

More Related