Pour a measured amount
Each press moves exactly 50 mL from one vessel to the other.
Liquid Measure Lab
Transfer conserved liquid between vessels and compare the heights of equal volumes in wide and narrow containers.
Grades 2–5 · Math
Your goal
Keep all 600 mL, leave 300 mL in the left vessel, and make that vessel narrow.
Reduced motion is on. The controls still update the scene.
Left vessel 600 mL. Right vessel 0 mL. Total 600 mL. The left liquid height is 100.0 diagram units.
Both ideal vessels can contain the full 600 mL total. Transfers do not spill or evaporate. The narrow vessel has half the base area of the wide vessel, so the same volume rises twice as high. The scale labels measure volume, not height.
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Learn with Liquid Measure Lab
Liquid Measure Lab gives elementary students a concrete way to separate liquid volume from liquid height. Children transfer water between two vessels in fifty milliliter steps, keeping a visible total of six hundred milliliters throughout the activity. Changing the left vessel from wide to narrow raises the water level without creating any extra liquid. Nine goals ask students to reach different distributions and inspect the narrow vessel. The graduated diagrams and text feedback support discussion about capacity, conservation, subtraction, and why a taller water column need not contain more water.
What to look for
Compare heights
Change the left vessel shape and watch the level while its volume stays fixed.
Check the total
Add the two displayed volumes after a transfer to confirm that no liquid disappears.
For teachers and curious learners
Distinguish liquid volume from height while conserving the total. Ask students to predict what will happen, change one setting, and explain what they observe. Learn gives a starting point. Practice and Challenge offer new goals with the same scene.
Both ideal vessels can contain the full 600 mL total. Transfers do not spill or evaporate. The narrow vessel has half the base area of the wide vessel, so the same volume rises twice as high. The scale labels measure volume, not height.