Chapter 1

01 Chapter Edited.ppt

Chapter 1 focused on the nature of science, experimental design, models, and the branches of science.

Students should have an understanding of the different broad branches of science. These include, but are not limited to, life science, physical science, etc.

Students should understand and be able to identify or give an example of an idea model, a computer model, and a physical model. They should also be able to describe the benefits of using a scientific model.

Experimental design, including variables, controls, groups, hypotheses, and other parts of a controlled experiment are key points to understand.

SOME Key Terms:

Independent Variable: The variable in the experiment which you are controlling. In the case of our Alka-Seltzer lab, it was the type of water we were using to dissolve the alka-seltzer.

Dependent Variable: The variable in the experiment which changes when the independent variable changes. It DEPENDS on the independent variable. It is usually the variable which you are measuring or observing. In the alka-seltzer experiment, it was the time it took the tablet to dissolve.

Hypothesis: An educated guess based on the information your currently have. If new information comes available which goes against your hypothesis, you must create a new one taking the new information into account.

Scientific Theory: Attempts to explain WHY something happens the way it does.

Scientific Law: Attempts to make predictions based on repeated observations. It DOES NOT attempt to explain why something happens, only that it does.