ACT Science Practice Question #1538 (Medium (32)) | Test Citadel
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ACT Science Difficulty: Medium (32)

Digital ACT Science Practice Question #1538

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A paleoclimatology study compared Earth's orbital parameters with Pleistocene ice volume: - Orbital eccentricity oscillates on a ~100,000-year period. - Axial obliquity (tilt) oscillates on a ~41,000-year period. - Precession of equinoxes oscillates on a ~23,000-year period. Major glacial-interglacial cycles over the past 800,000 years occur primarily on which dominant pacing cycle?
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Major ice age cycles align with the 100,000-year eccentricity period.

Masterclass Solution & Distractor Trap Analysis

The primary pacing of late Pleistocene glacial periods matches the 100,000-year eccentricity cycle....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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