1. Level 6: The Mastery Science Test
GED® Science: Full-Length Practice Exam (Level 6 - Mastery) · preview lesson
This is the Mastery GED® Science practice exam -- a fresh test at the same elite ceiling as Level 5. The format never changes:
- 34 questions in 90 minutes, across Life, Physical, and Earth & Space Science; scored 100-200, 145 to pass.
What Level 6 is for: every item is a hard problem with all-new numbers and scenarios. You will run multi-step calculations, reason about momentum, energy, and equilibrium, predict inheritance outcomes, decide whether data truly supports a conclusion, and apply ideas from cosmology and deep time. If you can score well here, the real GED® Science test will feel comfortable.
If a quantity decays by half every step, what fraction remains after 3 half-lives?
Three halvings: 1/2 of 1/2 of 1/2 = 1/8.
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