Answer: Unlike the one way flow of energy, matter is recycled within and between ecosystems.
Explanation:
Fat is converted to carbon dioxide and water. You exhale the carbon dioxide and the water mixes into your circulation until it's lost as urine or sweat
IV: 4 types of nail polish
DV: brand of nail polish that lasts the longest
Control: nails
Constant: bottom coat and top coat
Experimental Group: Nail polish
Hypothesis: The types of nail polish would eventually chip away after a week .