Question

john wants to prove that the paved area of the playground is hotter than the grassy area of the playground. he measures the temperature of each area at three different times of the school day and records the temperatures. he does this for five days in a row. thomas wants to replicate johns experiment. which statement describes a situation that could cause thomass data to vary from johns data? a thomas uses the same equipment that john used. b thomas records the temperature data on a chart. c thomas measures the temperatures only on the sunny days. d thomas measures the temperatures of the paved area and the grassy area.

Explanation:

John measured temperatures over five - day period at different times of the school day. If Thomas only measures on sunny days, the weather condition (a variable not controlled in the same way as John's experiment) can cause his data to vary. Using the same equipment (A) and recording on a chart (B) and measuring the correct areas (D) are correct replication steps and won't cause data variation.

Answer:

C. Thomas measures the temperatures only on the sunny days.