Buoyancy. Chapter 1: Lesson 2. Aim. Why did the Titanic Sink?. Objectives. Students will be able to define buoyancy. Students will be able to explain why some objects sink while others float. Students will be able to explain what happened to the Titanic when it hit the iceberg. Buoyancy.
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Chapter 1: Lesson 2
Why did the Titanic Sink?
Why do some objects float, while other objects sink?
A coin sinks because it weighs more than the water it displaces.
The aluminum ball floats because it contains air within its folds.
Air weighs less than water, so the ball weighs less than the water it displaces.