1 / 7

The Scientific Method

The Scientific Method. Question. Well defined Testable Measurable Controllable Reasonable and consistent with existing bodies of knowledge. Consider These Questions. Are serial killers evil by nature? What is the cause of AIDS? Why is grass green?

camillad
Télécharger la présentation

The Scientific Method

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. The Scientific Method

  2. Question • Well defined • Testable • Measurable • Controllable • Reasonable and consistent with existing bodies of knowledge

  3. Consider These Questions • Are serial killers evil by nature? • What is the cause of AIDS? • Why is grass green? • What is the best recipe for chocolate chip cookies? • When will the big earth quake hit San Francisco?

  4. Hypothesis • Testable • Falsifiable • Written as a statement

  5. Which of the following is a useful scientific hypothesis? • Plants absorb water through their leaves as well as their roots. • Mice require calcium for developing strong bones. • Dogs are happy when you feed them steak. • HIV can be transmitted by cat fleas.

  6. Variables • Dependent • The variable measured, counted, or recorded. • Placed on y-axis of a graph • Independent • What the investigator deliberately varies or manipulates during an experiment. • Chosen because it is thought to affect the dependent variable • Placed on x-axis of graph • Control • Variables or factors that are kept equal in all treatments.

  7. Identify the D and I variables • Height of a bean plant recorded daily for 2 weeks. • Mice are kept at different temperatures for 6 weeks. Percent weight gain is recorded. • A hypothesis proposes that dog weight increases with fewer litter mates. • Seeds are soaked in salt solutions of different concentrations and germination is counted each day. • The diversity of coastal algal species is calculated before and after an oil spill.

More Related