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Which is one source that scientists use to reconstruct past climate conditions?
fossils frozen in glaciers
daily temperatures
the tilt of Earth’s axis
running water
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fossils frozen in glaciers
Explanation: fossils and ice cores provide physical evidence (pollen, plant/animal remains, trapped gases, isotopes) that scientists use as proxies to reconstruct past climate. Daily temperatures are only recent records; the tilt of Earth’s axis is a climate driver, not an observational source; running water isn't a primary source for long-term climate reconstruction.
Explanation: fossils and ice cores provide physical evidence (pollen, plant/animal remains, trapped gases, isotopes) that scientists use as proxies to reconstruct past climate. Daily temperatures are only recent records; the tilt of Earth’s axis is a climate driver, not an observational source; running water isn't a primary source for long-term climate reconstruction.
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