Grade 1 · Science · Lesson 22

Experiment — Sink or Float?

Drop a coin and a wooden stick into water. The coin sinks to the bottom while the stick bobs at the surface. Why? Scientists discovered it all comes down to something called density.

What this lesson teaches

1Predict whether everyday objects will sink or float
2Sort objects correctly as sink or float
3Explain that objects float when they are less dense than water — and that size alone does not decide the answer

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