Scientific Method Flashcards
(29 cards)
A test to compare DNA or proteins. DNA is cut with enzymes then placed in wells. Small fragments fall to the bottom of the plate to compare banding patterns to read.
Gel electrophoresis
Separates pigments in a solution. A test to separate pigments (color). You do this by putting the pigment above the water line.
Chromatography
A chemical that changes color with another chemical. Example: iodine= amber
Iodine+ starch= blue/black
Indicator
“Normal” with medicine studies= placebo used for comparison.
Control (group)
What to measure to answer the research question. Put on y axis. “Amount of” “rate of”
Dependent variable
Educated prediction…..
If (we do this)….., then (this will happen)…..
Hypothesis
One per experiment; one factor that you change; category; “type of”
Independent variable
Used for the control group in medicine studies; -saline shot or sugar pill
Placebo
- large group of test subjects
- must have a large sample size to have accurate and reliable data
- reduces affect of individual differences
Sample size
A hypothesis that has supported many many many times.
Similar to a law but more complex understanding.
Theory
Belief that is influenced by assumptions.
Bias
Conclusions based on observations
Inference
Several scientists examine the details of the experiment
Peer review
Decision about the results
Conclusion
Experiment where the only variation between groups is deliberate
Controlled experiment
Information gathered for an experiment
Data
Data that is collected by the senses
Observations
Magnifies translucent objects
Compound light microscope
Chart with two options per level, used to classify organisms
Dichotomous key
Examination of preserved specimens
Dissection
Tool used to measure liquid volume
Graduated cylinder
Enlarge the view of the object
Magnification
Quantity of matter
Mass
Tool used to determine length in metric units
Metric ruler
