A study examines how sandstone weathers over time due to sun

A study examines how sandstone weathers over time due to sun - GED Prep

Question

A study examines how sandstone weathers over time due to sunlight exposure. A chamber for aging acceleration was used to model accelerated weathering. Rock samples were placed in the chamber, and different weathering conditions were simulated, such as rain, sun, and frost. Each cycle lasted 24 hours. To determine how many cycles created weathering, two rock types were exposed to different weathering conditions in three stages.

What is the independent variable in this experiment?

Answers

Percentage that the sandstone weathered
Rock Type B
Rock Type A
correct

Weathering conditions in the chamber

Explanation

The independent variable is the factor that researchers manipulate in an experiment to observe its effect on the dependent variable. In this study, the weathering conditions in the chamber are being varied across different stages. The number of cycles and the resulting weathering percentages for rock types A and B change as a result of these different conditions. The rock types and weathering percentages are dependent variables, while the number of cycles is part of the experimental setup. Therefore, the weathering conditions in the chamber are the independent variable being tested in this experiment.

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