Pill Bug Lab
what type of graph do you use for the pillbug lab?
a line graph
what graph do you use for the potato osmosis lab?
line of best fit
where is the independent variable on a graph
on the x-axis
What is a hypothesis?
A educated guess or theory for an observation made before you begin a lab.
What is experimental design?
The plan for an experiment on how to test the hypothesis in a clear and structured format
what is the p-value ALWAYS for biology
0.05
what does it mean when the molarity of a potato is at 1?
it was in a hypertonic solution
where is the dependent variable on a graph
on the y-axis
What is an if/then hypothesis?
It is a hypothesis predicting a cause and effect.
What is the procedure?
Written step-by-step explanation of the lab process
what is the chi-square formula
sum of = (o-e)^2/e
when the line crosses the x-axis at zero, what environment is the potato in?
isotonic
What are the 5 requirements for any graph?
both axis named, title, units, label x and y, color/key
What is a controlled variable?
It is a variable that you use as a reference throughout your experiment that does not change.
What is the discussion part of the lab?
Written analysis of lab results, including restating hypothesis and comments about how the lab went (ex/ areas of improvement, what went well)
what is the degree of freedom for this lab
1
if there was an increase in the potatoes mass, what solution is it in?
hypotonic solution
Dependent: Positive and negative % change
Independent: Sucrose molarity
What is qualitative vs. quantitative data?
Qualitative data is descriptive (ex/ brown hair), and quantitative is numerical (ex/ 67 chickens)
What is the order of steps in experimental design?
Hypothesis, Objective, Experiment, Process, Discussion
How do pill bugs demonstrate kinesis vs. taxis in this experiment?
Random movement vs. directional movement
out of all of these numbers --> -6.34%, 6.2%, -4.2%, 0.5%, -6.8%, 11.2% which one has a molarity of 0.8?
-6.34%
What is the independent and dependent variable for the pill bug lab?
Independent: Time (min)
Dependent: # of pill bugs
What is the null hypothesis?
The observed and expected data will have no difference.
How do you determine whether data supports or rejects a hypothesis?
Compare results to predicted outcome