Interpret Earth temperatures from simulated deep-sea and ice cores

The new Earthlearningidea today is 'Interpret Earth temperatures from simulated deep-sea and ice cores' This activity uses sweets to simulate oxygen isotope ratios in cores.

This is an activity to plot Earth’s temperature indications from mock ice and deep-sea sediment cores. The activity consolidates understanding of how the 18 O: 16 O ratios in ice cores and deep-sea cores respectively can be interpreted in terms of warmer (interglacial) or cooler (glacial) Earth temperatures.
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