1. Scientific method
Lecture #1, Chapter 1
by John Cozza, Biology Dept.
(some material modified from Raven, Biology 9th
ed.)
2. Energize your clicker!
• Register your clicker online at
http://www1.iclicker.com/register-an-iclicker
using your Panther ID!
• Press and hold power button
for 2 sec.
• Enter frequency “AA” ( or ●)
• Answer questions.
• or ● means OK.
• No or ● or means not OK.
• Please help your neighbor!
3. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
4. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
5. Goals of General Biology 1
Describe & discuss
•Cell components and
how they function
•Inheritance on the
molecular, organismal,
and population levels
•Mechanisms of and
evidence for evolution
•Relevant applications
6. Study plan
1) Read relevant chapter(s)
– Summaries, figures
– Review questions
1) Participate in lecture
– Interaction
– Notes
1) Review lecture ASAP
– Book
– Study group
1) Ask Qs & use office hours
8. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
10. What is life?
• Movement
• Organization
• Compartmentalization
• Growth & reproduction
• Heredity
• Evolution
• Metabolism
• Interact with environment
• Homeostasis
• Entropy?
• Emergent properties http://environment.nationalgeographic.com/en
vironment/natural-disasters/hurricane-profile/
http://www.erh.noaa.gov/okx/okxfirewx.html
11. Define life?
Life is a
“self-sustaining
chemical system
capable of
Darwinian
evolution.”
- G.F. Joyce,
adopted as the
NASA definition Bains, W. 2004. Many chemistries could be
used to build living systems. Astrobiology
12. Think—pair—share:
Evidence for life on Earth?
NASA Galileo spacecraft
http://solarsystem.nasa.gov/multimedia/
display.cfm?IM_ID=462
Earth from Galileo spacecraft.
Closest approach 960 Km
13. Evidence for life on Earth?
• Abundant H2O
• Abundant O2
• Disequilibrium of CH4
• Absorption of red;
reflectance of green
• Radio wave emissions
Earth from Galileo spacecraft
Sagan, C. et al. 1993. A search for life
on Earth from the Galileo spacecraft.
Nature 365: 715-721
14. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
19. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
20. Key questions
• How did life begin?
• What were the major
innovations?
• Which were likely vs.
unlikely?
Archean eon
By Martin Schuler
23. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
27. Science has many methods!
observations
question
hypotheses
predictions experiments
hypotheses supported
or rejected
correlations
model
description
theory
-big picture
-diverse support
28. Interactive question #1
A researcher is investigating the effect of
moderate wine consumption on
cardiovascular health. An example of a
prediction associated with the study
would be
A.Red wine is an antioxidant.
B.Red wine is popular in Italy, which has a
lower rate of heart attacks than the US.
C.Red wine slows atherosclerosis.
D.Red wine drinkers will have fewer heart
attacks than non-drinkers.
32. Science of Biology outline
• How to succeed
• What is life?
• Levels of organization
• Brief history of life
• Scientific method
• Examples of inquiry
– Evolution
– Climate change
33. Climate change: is it real?
http://www.skepticalscience.com/solar-activity-sunspots-global-warming-advanced.htm
Data from tree rings,
ice cores, sediments
36. Interactive question #2
Rising global
temperatures since
the late 1800s is an
example of a(n)
A.observation
B.hypothesis
C.model
D.correlation
E.experimental result
39. Interactive question #3
“Temperature rise in the
20th
century was caused
by increased [CO2]” is an
example of a(n)
A.observation
B.hypothesis
C.model
D.correlation
E.experimental result
41. Interactive question #4
The relationship of CO2
to temperature since
1970 is an example of
a(n)
A.observation
B.hypothesis
C.model
D.correlation
E.experimental result
42. Sea level rise
Projection of sea level rise from 1990 to 2100, based on three different
emissions scenarios. Also shown: observations of annual global sea
level rise over the past half century (red line), relative to 1990.
http://www.epa.gov/climatechange/science/future.html
43. Interactive question #5
Scenarios for sea level
rise by 2100 are an
example of a(n)
A.observation
B.hypothesis
C.model
D.correlation
E.experimental result
44. Science of Biology summary
• How to succeed
• What is life?
– Characteristics
– Levels of organization
– History
• Scientific method
Next:
• Biological molecules
