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Science
- Study of natural world
- chemistry
- - physics
- - ecology
- - geology
- - biology
Utilizes a Process - - Scientific Method
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Scientific Method
- -obsevartion
- -problem statment
- -- how, what, why- hypothesis
- - test (experiment)
- -analysis
- -conclusion
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Experiments
- Control Group
- - nothing changed
- Experimental Group
- - one thing changed
- - experimental value
Problems - - sample size
- - sample composition
- - human studies
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Unknown Disease
- observation
- –abnormal number of people with
- arthritis
- problem
- –what is the cause of the
- arthritis?
- other observations
- –most victims heavily wooded areas
- –disease not contagious
- –summer symptoms
- –reports of bulls-eye rash
hypothesis - –pathogen spread by insect or tick
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Lemon Ant Tree
- A.No seeds germinate in test plot
- B.Use plant extract on seeds in plot
- C.Why are no plants growing near tree?
- D.No plants grow near the tree
- E.Maybe something in plant tissues inhibits
- seed germination
- F.Plant produces substance toxic to seeds
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Theory
- Conceptual theme supported by lots of
- observations and data
- –much more than a guess
- Biological theories
- –cell,biogenesis, gene, evolution
- Hypothesis ---> theory ---> law
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Testable?
- How best to live life?
- What is good art?
- Who’s the greatest football player of all
- time?
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Biological Hierarchy
- very small to very large
- atoms, molecules, cells, --->
- tissues, organs, organ systems, ---->
- organisms, populations, --->
- communities, ecosystems
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