space medium true/false

CAIs (Calcium-Aluminum-rich Inclusions) are the oldest dated solids in the solar system at ~4.567 Ga.

  1. True
  2. False

Answer: True

CAIs in chondrites define solar system age via U-Pb dating; formed at high temperatures near proto-Sun before accretion into planetesimals.

Topic Solar System - Formation
Exam Relevance SSC CGL, UPSC Prelims

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