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Chemistry, 30.01.2020 02:43 Kashawilliams2142
Roberto noticed a lot of erosion on one hillside following a heavy rain . he wonders why one hillside shows more erosion than others. he sets up the experiment shows below .using a watering can to simulate rain , roberto pours the same amount of wáter at the same speed on each tray. identify the controlled variables and the variable that is tested in roberto's experiment .
a]soil 30° b]soil and gravel 30° c]soil and grass 30°
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Roberto noticed a lot of erosion on one hillside following a heavy rain . he wonders why one hillsid...
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