Biology Lecture Ch #1

Taking observations or facts and creating a new proposition that is compatible with those facts and observations.

• -Observations
• -Questions
• -Hypothesis tentative answers to questions
• -Predictions based in hypothesis
• -Testing the predictions by making additional observations or conducting experiments

Making predictions based on the hypothesis


EX-Tyrone Hayes predicted that frog tadpoles exposed to atrazine would show adverse effects of the chemical once they reached adulthood

manipulate one or more factors being tested

compare unmanipulated data gathered from different sources

an expirement that starts with groups that are simalar

hypothesis is based on a variable

hypothesis is based on this

a critical factor in an expirement

an expirement that starts with a prediction that there is a difference between groups based on the hypothesis

-variables are not controlled

can be manipulated

Changes in response to the independant variable

the premise that no difference exists

quantified observations

• -be testable
• -have the potential of being rejected

causes evidence taht the power of biology depends on