Scientific Method Flashcards
(30 cards)
Gel Electrophoresis
A test to compare DNA or proteins
DNA is cut with enzymes then placed in wells
Small fragments fall to bottom of plate
Compare banding patterns to read
Chromatography
A test to separate pigments
Put pigment above water line
Indicator
A chemical that changes color with another chemical
Ex.Iodine=Amber
Iodine +starch = blue/black
Control group
“Normal”
With medicine studies=placebo
Used for comparison
Dependent variable
What to measure to answer your research question
Put on the y-axis
“Amt of”
“Rate of”
Hypothesis
Educated prediction
If (we do this) then (this will happen)
Independent variable
One per experiment
One factor that you change
Category
“Type of”
Placebo
Used for the control group in medicine studies
Saline shot or sugar pill
Sample size
Large group of test subjects
Must have a large sample size to have accurate data and reliable data
Reduces affect of individual differences
Theory
A hypothesis that has supported many many many times
Similar to a law but more complex understanding
Compound light microscope
Magnifies a translucent object
Only use fine adjustment on high power
Dichotomous key
Chart with 2 options per level used to classify organisms
Dissection
Examination of preserved specimen
Graduated cylinder
Tool used to measure liquid volume
Magnification
The enlarged view of the object
Mass
The quantity of matter
Metric ruler
A tool used to determine length in metric units
Inches, centimeters,meters…
Model
A representation of concept that is difficult or impossible to view
Stain
Chemical used to see the see the cell on a microscope better
Triple beam balance
Used to find mass in grams
Use bigger weight first then medium weight then the small weight
Volume
A space an objects occupies
Conclusion
The decision about the results in an experiment
Control
The reference point used for a comparison
Controlled experiment
A experiment where the only variation between groups is deliberate
