Which of the Following Represents a Physical Change

question 117

Multiple Choice

Which of the following represents a physical change?

• A) stretching of a silver wire
• B) tarnishing of silver
• C) both stretching of a silver wire and tarnishing of silver
• D) neither stretching of a silver wire and tarnishing of silver

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Definitions:

Chi-Square

A statistical test used to determine if there is a significant difference between the expected frequencies and the observed frequencies in one or more categories.

Goodness-Of-Fit Test

A statistical test used to see how well sample data fit a distribution from a population with a normal distribution.

Lower-Tail Test

A statistical test used to determine if a data sample is significantly lower than the population mean.

Upper-Tail Test

Is a statistical test where the critical area, where we reject the null hypothesis, is located in the upper tail of the distribution.