Sample Objects and Tools:Object StoneMeasuring Tool Graduated CylinderUnit mL (via water displacement)Object CupMeasuring Tool Measuring CupUnit mLObject SpoonMeasuring Tool Measuring SpoonUnit tsp/mLObject DropperMeasuring Tool DropperUnit drops/mLObject BoxMeasuring Tool Ruler (L×W×H)Unit cm³The stone was the hardest to measure using the tools, especially if not using water displacement. Its irregular shape made it hard to calculate volume accurately with standard measuring tools.