This is a little late for me but Muse points us to the Texas TAKS 8th grade science test.
Some of the questions are hard. I got 48 out of 50 but one mistake was carelessness. On the other question I missed, none of the answers was completely correct and it seems a poor question. That score seems to put me at the 99% level.
My argument over the question I missed: If you scrape off the ground and create a gravel pit you remove the plants that would have absorbed some of the ground water but those plants also would reduce Carbon Dioxide and increase Oxygen and otherwise affect air quality. Which is the lesser environmental impact? Are you sure? Is this a reasonable 8th grade question?