Can you identify what happens when scale changes?

Quiz

Question

Consider a map of global temperatures in 2020, which of the following best describes what would happen if the pixel size (i.e., grain size) was increased?

Variance among pixels would increase

Incorrect, increasing grain averages out fine-scale differences among pixels.

Variance among pixels would decrease

Correct, increasing grain size result in pixels that are more alike and therefore reduces variance among pixels.

Impossible to know

Incorrect, changing grain size has predictable effects on variability among pixels.

Global temperature would appear to be decreased

Incorrect, large grain sizes represent the average taken from smaller pixels.

Global temperature would appear to be increased

Incorrect, larger grain sizes represent the average taken from small pixels.

Looks Good! Correct, increasing grain size result in pixels that are more alike and therefore reduces variance among pixels.

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