Lecture 2 - Scientific Method

Question 1

Growing Concern

Industrial Expansion

Answer 1

-More pollutants
-World wars
-Industrialized nations competing for use of resources
-Waste going Into ocean

Question 2

Growing Concern

Cuyahoga River

Answer 2

-First attention to pollution
-Wasn’t covered by media
-Times magazine article
-Led to Ocean Act of 1972

Question 3

Growing Concern

Rachel Carson “Silent Spring”

Answer 3

Concerned about synthetic pesticides
-DDT

Question 4

Growing Concern

DDT

Answer 4

• Almost harmless to humans
• Used on crops and humans (fleas, lice)
• Led to be a significant killer for big raptors

*began environmentalism movement

Question 5

Growing Concern

Bioaccumulation

Answer 5

Accumulation overtime of a substance and especially a contaminant in a living organism

Question 6

Growing Concern

Biomagnification

Answer 6

Concentration of toxins in an organism as a result of its ingesting other plants or animals in which toxins are more widely disbursed

EX: Zooplankton –> small fish –> birds –> humans and animals

Question 7

Green Belt Movement

Answer 7

Women in Kenya

Question 8

Scientific Method

Answer 8

1. Make observations / Ask questions
2. Background research
3. Testable hypothesis
   *Fails to be proven wrong –> Law
4. Test / Gather data
5. Interpret results

Question 9

B4WARMED Experiment

Answer 9

• University of Minnesota

-Two Hypothesis:
1. Warming temperatures will enhance the growth and survival of temperature (southern) tree species

2. Warming temperatures will reduce the growth and survival of boreal (northern) tree species

-Plots randomly assigned one of several treatments
* +4 above
*+2 above
*no change