Predict Whether an Object Will Float or Sink: Understanding Density


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An object has a mass of 20 kilograms, and a force of gravity of approximately 200 newtons on dry land. If that object is placed in water, what will the force of gravity on the object be?

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1. Which two forces determine whether an object sinks or floats?

2. Why does a large, light object tend to float?

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About This Quiz & Worksheet

You'll be tasked on this quiz/worksheet with questions on subjects like density-related forces, the reason objects float and sink, and buoyancy.

Quiz & Worksheet Goals

Particularly, you'll be answering questions about:

  • An object's force of gravity
  • Forces that determine if objects float or sink
  • The reason large, light objects usually float
  • Whether or not certain objects sink/float
  • Buoyancy's definition

Skills Practiced

  • Knowledge application - use your knowledge to answer questions about objects' tendencies to sink and float
  • Information recall - access the knowledge you've gained regarding buoyancy
  • Interpreting information - verify that you can read information regarding density calculation and interpret it correctly

Additional Learning

See what else your brain can ingest as far as density goes by taking advantage of our related video lesson by the name of Predict Whether an Object Will Float or Sink: Understanding Density. This lesson will be on:

  • The relationship between forces and buoyancy
  • Examples of objects that float and sink
  • Why some objects are buoyant and others aren't