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417 words used in the labs.

Find a term from the labs, understand the process behind it, and see how it appears in the landscape. Each entry connects an explanation with a real observation and a model you can explore.

Curie point

The temperature above which a material loses its spontaneous ferromagnetic or ferrimagnetic ordering; about 580 °C for pure magnetite.

What to look for

Magnetite, photographed in the Smithsonian collection. Pure magnetite loses its spontaneous magnetic ordering near 580 °C, its Curie temperature. This specimen photograph shows the mineral, not a temperature measurement.

Metallic black octahedral magnetite crystals on rock, Smithsonian specimen B10614 from Binnental, Switzerland.
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Explore further with USGS water glossary · USGS volcano glossary · NPS glacial geology · NASA Earth facts. Photograph acknowledgements are collected on the Image credits page.