Density Submarine
An object sinks when it is denser than water, floats when it is less dense, and hovers when the densities match; changing mass or volume changes density.
PhysicsAges 10-13~10 min🎙️ Voice tutor
Play freeNo account needed
What your child will figure out
- Predict floating, sinking, or hovering by comparing an object's density with water.
- Create neutral buoyancy with more than one valid mass-and-volume combination.
- Predict that adding cargo without adding volume increases density and makes a hovering submarine sink.
- Transfer the density rule to new objects, then continue with generated scenarios whose difficulty adapts to accuracy, speed, and hints.
The levels
- Dive or rise?
Use the explicit submarine-versus-water density comparison to predict motion.
- Find the balance
Find any mass-and-volume combination inside the wide neutral-buoyancy zone.
- Cargo surprise
Predict the effect of adding mass while submarine volume stays fixed.
- Ocean object lab
Transfer the density rule to a beach ball, rock, and fish and explain each result.
Ready when they are.
Play Density Submarine free — no account, no card.
Play Density Submarine free