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Only one, because if you do two or more, you won't know which one caused a change,
Wiki User
∙ 14y ago
Wiki User
∙ 12y agothe scientist should test one variable at a time.
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A controlled experiment allows the scientist to isolate and test?
a conclusion
What is an controlled experiment?
A controlled experiment can be used to test almost anything. In a controlled experiment, the scientist (or experimenter) use a control group and an experimental group. The control group has nothing changed about it, and experiment group is changed based on the variable of the experiment. One of the most common uses of controlled experiments is the testing of new medications. In a medical study, a pharmaceutical company usually brings in a group of 100 people. Those people people are randomly assigned to two groups of 50. The experiment group is given the medication being tested, and the control group is given a placebo (a sugar pill). After several weeks, the experimenter can then see the side-effects of the medication, by comparing the differences between the experiment and control groups.
What part of speech is the word experiment?
Experiment can be a noun and a verb. Noun: A test under controlled conditions. Verb: To conduct an experiment.
What do scientists call an extra test?
they call it investigation/experiment.
What was Van Helmont's hypothesis in the willow experiment?
To test his hypothesis
How many variables can you test in an experiment?
one
How do the test variables (independent variables) and outcome variables (dependent variables) in an experiment compare?
The test variable (independent variable) controls the outcome variable (dependent variable).
How many variables do you test within one experiment?
Generally speaking, you only want to test a single variable within one experiment so when a change occurs you know what caused it. If you change multiple variables at once it is harder to attribute the change to a single cause.
A controlled experiment allows the scientist to isolate and test what?
to isolate and test single variables
How many variables should you have when you test a hypothesis?
there should be atleast 1
How many variables does a controlled experiment test?
As many as you need. You can't change more than one if you want accurate results.
How many factors should an experiment test?
1
A controlled experiment allows the scientist to isolate and test?
a conclusion
What variables did Galileo test when he conducted his pendulum experiment?
he sucked balls and he was gay
How many variables are generally tested in an experiment?
The trick to designing a good experiment is to figure out a way for it to test the effects of only one variable, and to avoid any effects of others.
When a experiment only has one variable that can change and all other variables are kept unchanged this type of experiment is an?
it is a fair test
What variables did Pasteur change in his experiment to test the hypothesis of spontaneous generation?
The shape of the flask!
