Which of the following statements is true?
A hypothesis is created at the end of an experiment.
The dependent variable is changed by the experimenter.
The best hypotheses are written as answers to a question.
Observations are often used to form questions about the world
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No.
http://www.sciencebuddies.org/science-fair-projects/project_variables.shtml
it has to be C
Maggie is using her cat in an experiment on animal intelligence. Which of the following statements is true?
Maggie's experiment is poorly designed.
Since Maggie is using her own cat, her hypothesis will be proven false.
Maggie does not like her cat, so it is impossible for her to be biased.
If Maggie gives her cat an unfair advantage, her experimental results will be biased.