Examlex
You have cut a hole in the middle of a large sheet of metal.When the sheet is heated,the area of the hole
Longitudinal
An observational research method in which data is gathered for the same subjects repeatedly over a period of time.
Participants
Participants are individuals who take part in a process or activity, especially in research or experiments.
Representative
Serving as a typical or characteristic example of a group or class; or, in politics, someone elected to act and speak on behalf of a wider group.
Elementary School
A primary educational institution where children receive their initial stage of compulsory education.
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