D:\Students Documents\Biology 1 2

455 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
455
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

D:\Students Documents\Biology 1 2

  1. 1. How scientists work 1.2<br />
  2. 2. Spontaneous Generation<br />Hypothesis (disproven) stating that life could arise from nonliving matter. <br />
  3. 3. Controlled Experiment<br />A test of the effect of a single variable by changing it while keeping all other variables the same.<br />
  4. 4. Manipulated Variable <br />Factor in an experiment that a scientist purposely changes; also known as independent variable. <br />
  5. 5. Responding Variable<br />Factor in an experiment that a scientist wants to observe, which may change in response to the manipulated variable; also known as a dependent variable.<br />
  6. 6. Theory<br />Well-tested explanation that unifies a broad range of observations.<br />
  7. 7. Key Concept<br />How do scientists test hypotheses? <br />Scientists test a hypothesis by an experiment in which only one variable is changed at a time. All other variables should be kept unchanged, or controlled.<br />
  8. 8. Key Concept<br />How does a scientists theory develop?<br />As evidence from numerous investigations builds up, a particular hypothesis may become so well supported that scientists consider it a theory.<br />

×