Variables
The variable that the scientist changes
independent variable
What should the x-axis of a line graph represent for an experiment?
the independent variable
Why hold clinical trials?
to test the effectiveness of new medical treatments.
True or False: You can test multiple variables at once in an experiment.
Fals
Freebie
YAY
The variable that the scientist measures
dependent variable
What should the y-axis of a line graph represent for an experiment?
the dependent variable
What is a placebo.
False medications used as a control in clinical trials
What form should an experimental question be in?
"Does [independent variable] affect [dependent variable]?"
what are you going to get on the test on Friday?
100%
The variables that must be kept constant
control variable
What is the purpose of a double-line graph as opposed to a single-line graph?
To compare two sets of data.
Name one role the FDA plays in clinical trials.
mandates 3 phases, ensures participants have informed consent, etc.
In an experiment testing the effect of studying on test scores, the student studied before the test. What group would this be considered?
experimental group
True or False: Experimental questions can include questions that are based on opinion, value, or judgement.
False
Name the dependent variable in the following experimental question:
"Does the amount of sleep a scholar gets affect their test scores?"
test scores
See graph: write a conclusion statement based on the data in the graph.
"As years increase, value decreases"
Trial A: 40 out of 50 participants in a clinical trial for a drug to reduce stress reported feeling less stress after the trial.
Trial B: 4 out of 5 participants in a clinical trial for a drug to reduce stress reported feeling less stress after the trial.
Which trial should you trust more and WHY?
Trial A. A larger sample size is more reliable.
In an experiment testing the effect of studying on test scores, the student did not study. What group would this be considered?
control group
What is the purpose of control variables?
To ensure that the independent variable is the only factor having an effect on the dependent variable.
Name at least 3 control variables for the following experimental question:
"Does sunlight affect the height of plant A?"
any 3: amount of water, temperature, amount of soil, soil type, container, depth of seed in soil, etc.
Name 3 qualities of a good data table.
Labeled columns, clear units, a title, left column for independent variable, right column for dependent variable, etc.
A mattress company offers free trials of their comfiest mattresses at the same time as a trial testing treatment for back pain. What problems might arise from this for the trial?
The mattresses may help east the back pain of participants in the trial which will affect how accurate the results are.
What is scientific inquiry?
The methods scientists use to study the natural world.
Mr. Urda wants to know if eating healthier will make him more funny. What is his experimental question?
Does eating healthy affect funniness?