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Why do some objects float while others sink?

Test how material, shape, and water work together.

ScienceClass 63 min video + interactive
Preview of the floating and sinking video2:44

What you'll learn

  1. 1Why some objects float
  2. 2Why some objects sink
  3. 3How shape can change what happens

What happens next

Watch short videoSee why some objects float while others sink.Try the float or sink experimentTest objects in water and change the shape of clay.Quick check quizTest what you've learned.
Watch VideoSkip to Interactive