Transcript Chapter 1 “Biology and You”

Chapter 1
“Biology and You”
Section 3
The Scientific Process
Hot Chicks
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Cool Studs
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Video Clip
Cold Comfort - Some
remedies for the
common cold may be
all in your head.
http://www.pbs.org/saf/1
105/video/watchonline.
htm
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The Studies of John Harte and
David Bradford
• Amphibian decline
• Rocky Mountain
Salamanders
• Acid Rain??
Scientific method steps
Observation
• Keeping careful and
detailed records of
what we perceive.
• Often answers
questions, often
RAISES MORE
questions.
Asking Questions
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• Nothing can be assumed!
• In science we NEED…
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Forming an Hypothesis
• An explanation that
MIGHT be true.
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• Predicting the
outcome based on
the hypothesis
Confirming Predictions
• Gathering data
• Performing an
experiment
– Control group
– Independent variable
– Dependant variable
(Know the difference!
Pretty Please??)
Drawing Conclusions
• Does the data support
the hypothesis?
• If not, was it a waste
of time????
HEAVENS NO!!!!!!!!
• Disproving a
hypothesis opens the
door for more
experiments!
What EXACTLY is a Theory?
• A set of hypothesis
that have been tested
and confirmed many
times.
– Represents what is
MOST CERTAIN
– Based on evidence
– Can be changed with
new evidence
Theory is perceived differently by
the general public
The likelihood of some theories being
rejected in the future is VERY small….