Ready-made sim

Density lab

Four objects, one tank. Predict each, lower them in, explain the surprise.

Science6-83 min as a quick checkOfficial

5 stages

This stage runs alone as a quick check; the rest run in LabPath

PredictRuns as the quick checkCall sink or float for four objects, and say why.3 min

MeasureEnter mass and volume as you measure.8 min

CalculateDensity is computed; check one by hand.4 min

Explain the surprisePick the object that surprised you and explain it with your numbers.5 min

TransferA fifth object appears. Predict, then explain.5 min

Student preview · playable

Otter

PredictTestExplain

Quick check · Density lab

Water, 1.0 g/cm³

Steel boltWax candleFoam blockGlass marble

The tank unlocks after you predict.Densities come from your own measuring in stage 2.

Four objects go into water. Call each one before you touch anything.

Steel bolt

Wax candle

Foam block

Glass marble

Locked before the data, so it cannot be written afterward.

Whole sim in LabPathAssign it later, or start it live. No account until you publish.

Runs on2D view on a 4 GB Chromebook, iPad and phones from 360 px. Keyboard operable; state changes announced.

Misconceptions it can catch

Predicts sink or float by sizePredicts sink or float by weight alone

Gate: All four calls before the objects go in. Tutor: off, your thinking counts.