🧊 Sink or float: density

Unit 1 · Hands-on science lab · 12 min

Density = mass ÷ volume. Objects less dense than water (< 1 g/cm³) float; denser ones sink. Wood floats, iron sinks, ice floats.

Words in this lesson

• 密度 (mìdù) — density
• 质量 (zhìliàng) — mass
• 体积 (tǐjī) — volume

Try different materials in the simulation and watch which float.

Project: Kitchen lab: put an egg in water, add salt spoon by spoon, and record when it floats. (With an adult.)