Planetesimal: Definition, Theory & Hypothesis


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question 1 of 3

Planetesimals combine to form what?

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1. In what era of Earth's history were planetesimal collisions common?

2. How did planetesimals form planets?

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About This Quiz & Worksheet

Taking a look at how planets like Earth formed, this quiz and corresponding worksheet will help you gauge your knowledge of planetesimals and the theory of planet formation. The questions focus on the thing that planetesimals combine to form as well as the era of Earth's history when planetesimal collisions were common.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review:

  • Results of planetesimal collision
  • Era planetesimal collision was common
  • How planetesimals formed planets
  • Who postulated the theory of planetesimals
  • When the Earth finished forming

Skills Practiced

This worksheet and quiz will let you practice the following skills:

  • Interpreting information - verify you can read information regarding how planetesimals formed planets and interpret it correctly
  • Reading comprehension - ensure that you draw the most important information from the related planetesimals lesson
  • Knowledge application - use your knowledge to answer questions about the era planetesimal collision was common

Additional Learning

To learn more about how it all came together in the end, review the corresponding lesson titled Planetesimal: Definition, Theory & Hypothesis. This lesson will help you:

  • Understand what a planetesimal is
  • Identify how a cloud of microscopic cosmic dust and gas gave rise to our planets
  • Explain how old meteorites found on Earth are
  • Describe the importance of gravity in a working planetesimal theory
  • Appreciate what happened to the leftover fragments of rock