Scientific methods & Characteristics of Life Flashcards
Cell
is the smallest entity that has all the characteristics of life
Characteristics of life
growth movement nutrition excretion respiration reproduction sensitivity
growth
increase in cell and size number
movement
purposeful change of posture or position
nutrition
obtaining energy and materials it needs
excretion
removal of metabolic waste from the organism
respiartion
obtaining energy in the form ATP with the breakdown of large complex molecules
reproduction
make new organisms of the same specie
response (sensitivity)
ability of an organism to detect change in its environment and alter its behavior
metabolism
all chemical reaction taking place in a living organism
continuity of life
all living cells are derived from other living cells
biology
study of all living things
The sequence of the Scientific Method
- observation
- hypothesis
- predication
- test (experiment )
- results
- replication
- publish
observation
accurate report of a natural phenomenon
hypothesis
educated guess
prediction
based on the hypothesis
test
experiment check that the prediction is accurate
control : used for comparison
experiment : independent and dependent variable
results
data or information gathered and collected
replication
the experiment repeated
Published
scientific journal
theory
A hypothesis that stands up against all tests
Principle or Law
theory that is successful against long term testing
Limitations of the Scientific Method
- Insufficient Knowledge
- Method of Investigation: inadequate instruments
- Inability to Interpret Results
- Our changing Natural World
- Human Error:
• Improper use of measuring equipment
• Inaccurate observation
• Mistakes in recording
• Scientific Fraud - Faulty Conclusions
- Accidental Discoveries
- Personal Bias:
- Accuracy and Honesty
Double-blind test
Experiment where neither patient nor doctor know who is getting the drug or placebo
Placebo
A treatment (a pill or injection) without any active ingredient
