Digital ACT Science Practice Question #1523
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
More negative delta 18O = colder glacial climate.
More negative delta 18O (-45.5 permil vs -35.0 permil) reflects stronger fractionation in colder atmospheric temperatures....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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