Scientific Method Flashcards
(29 cards)
Chromatography
A test to separate pigments (color)
Put pigment above water line
Rachel Zoon
uh…answer xD
Gel Electrophoresis
A test to compare DNA or proteins
DNA is cut w/ enzymes then placed in wells
Small fragments fall to bottom of plate
Compare banding patterns to read
Indicator
A chemical that changes color w/ another chemical
Ex: iodine=amber
Iodine+starch=blue/black
Control
“Normal”
W/ medicine studies=placebo
Used for comparison
Dependent variable
What to measure to answer the research question
Put on 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 medicinal studies
-saline shot or sugar pill
Sample size
- large group of test subjects
- must have a large sample size the have accurate and reliable data
- reduces effect of of individual differences
Theory
A hypothesis that has been supported many many many times
Similar to a law by more complex understanding
Compound light microscope
Magnifies translucent objects
Dichotomous key
Chart with two options per level, used to classify organisms
Dissection
Examination of a preserved specimen
Graduated cylinder
Tool used to measure liquid volume
Magnification
Enlarge view of the object
Mass
Quantity of matter
Metric ruler
Tool used to determine length in metric units
Model
A representation of a concept that is difficult or impossible to view
Stain
Chemical used to enhance microscopic view of biological samples
Triple beam balance
instrument used to find mass in grams
Volume
The space an object occupies
Conclusion
Decision about the results
Controlled experiment
Experiment where only the variation between groups is deliberate
