Watch how this brave and wise Knight calmly applies the scientific method to determine whether or not the young woman is a witch. He helps to educate the ignorant village people at the same time!
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Questions…
1. In most experiments there are various factors (variables) that need either to be controlled, altered or measured.
(a) What name is given to the variable being deliberately altered in order to examine its effect?
(b) What name is given to the outcome being measured?
(c) In a graph of these two variables, which goes on the x-axis and which on the y-axis?
2. Why is a large sample size often desirable when carrying out a scientific investigation?
3. What word is used to describe how close together the results of an investigation are?
4. What is meant by a fair test?
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