Geography, 04.09.2020 01:01 ashylynn2423
Regina conducted an investigation to determine whether earthworms add nutrients to soil. She used two pots of soil. She added three earthworms to the first pot. She did not add any earthworms to the second pot, which was the control. Regina tested the nutrient levels of the soil in both pots after two weeks. What type of investigation is Regina conducting? A descriptive B comparative C experimental D procedural
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Does the threat of global warming require international cooperation? why or why not?
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In the developed world, women are increasingly more likely to delay childbirth until their mid- to late- twenties or long because
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Regina conducted an investigation to determine whether earthworms add nutrients to soil. She used tw...
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