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Type: Multiple-Choice
Category: Biotic and Abiotic
Level: Grade 9
Author: sebastiandavis12
Last Modified: 7 years ago

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Biotic and Abiotic Question

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Grade 9 Biotic and Abiotic

The thickness of the ozone layer is measured using
  1. centimeters.
  2. Dobson units.
  3. millimeters.
  4. ozone units.