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Hypothesis
Educated guess based on available information.
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Theory
A hypothesis with a large body of evidence to support it.
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Law
A well tested theorythat has become an undisputeable fact -- does not change.
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Variable
A condition that exists in more than one state. (extemper stature, pH, exposure to sunlight)
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Name 2 types of variables and define each.
- 1. Dependent - must be held constant in an experiment.
- 2. Independent - allowed to fluctuate, the independent variable is the subject of the experiment.
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Control group
Portion of the experiment that does not receive a treatment, this shows a baseline for comparison w/ the portion of the group that does receive treatment.
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Placebo
A sugar pill used in drug trials, anindividual in thtravail will not be aware if they are receiving the treatment or placebo to eliminate psychosomatic variables.
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Placebo effect
Some test subjects will respond to a placebo because they are told it is an actual treatment, when it is not.
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Scientific method
Is based on observation.
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Double blind study
The experimenters do not know whether an individual subject is getting the treatment or a placebo until the study is complete; this eliminates experimenter bias as a variable.
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Name the 8 characteristics of Life on Earth
- 1. Cellular
- 2. DNA based
- 3. Reproduction
- 4. Growth
- 5. Metabolism - use of energy
- 6. Homeostasis
- 7. Evolution
- 8. Carbon - water based
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Name 4 examples of non-living things on earth
- 1. Fire
- 2. Viruses
- 3. Prions
- 4. Crystals
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Put in order the Orginization of Life. Hint: 12 items.
- 1. Atoms
- 2. Molecules
- 3. Organelles
- 4. Cells
- 5. Tissues
- 6. Organs
- 7. Organ systems
- 8. Organisms
- 9. Population
- 10. Community
- 11. Ecosystem
- 12. Biosphere
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