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the claim

Earth's internal heat comes from residual accretion energy and radioactive decay.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
10 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Earth's internal heat comes from residual accretion energy and radioactive decay?

Yes. Multiple reference and peer-reviewed sources state that Earth's internal heat comes from two main sources: primordial heat left over from accretion and radiogenic heat from radioactive decay. Some sources note the relative contributions remain uncertain, but both sources are consistently identified.

Verdict: SUPPORTED · 10 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 10
Radioactive decay
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Radioactive decay. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Radioactive_decay

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More for · 9
Earth's internal heat budget - Wikipedia
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Earth's internal heat budget - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Earth%27s_internal_heat_budget

Is radioactive decay the cause of the high temperature of the Earth's core?
2011
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Is radioactive decay the cause of the high temperature of the Earth's core?. (2011). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/5537/is-radioactive-decay-the-cause-of-the-high-temperature-of-the-earths-core

Techno-economic assessment and potential of geothermal energy in Bangladesh for mitigating the energy crisis: a critical review
2026
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Techno-economic assessment and potential of geothermal energy in Bangladesh for mitigating the energy crisis: a critical review. (2026). sciencedirect.com. https://doi.org/10.1016/j.esr.2026.102098

Exploring the isopycnal mixing and helium–heat paradoxes in a suite of Earth system models
2016
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A., G., M.-A., P., & Patrick, A. R. (2016). Exploring the isopycnal mixing and helium–heat paradoxes in a suite of Earth system models. doi.org. https://doi.org/10.7916/D8TT4QTQ

Linking the core heat content to Earth's accretion history
2023
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Clesi, V. & Deguen, R. (2023). Linking the core heat content to Earth's accretion history. doi.org. https://doi.org/10.31223/x53d3m

The rise of continents—An essay on the geologic consequences of photosynthesis
2006
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The rise of continents—An essay on the geologic consequences of photosynthesis. (2006). hal.science. https://doi.org/10.1016/j.palaeo.2006.01.007

Rocky Planets as Heat Engines.
2026
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DL, L., D, B., M, A., P, B., E, B., PK, B., PA, C., N, C., JC, D., B, F., T, G., SI, K., F, M., L, N., A, R., T, S., & RJ, S. (2026). Rocky Planets as Heat Engines.. doi.org. https://doi.org/10.1007/s11214-026-01317-3

Age of Earth
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Age of Earth. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Age_of_Earth

Partial radiogenic heat model for Earth revealed by geoneutrino measurements
2011
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A., G., A., D. D., & D., M. R. (2011). Partial radiogenic heat model for Earth revealed by geoneutrino measurements. authors.library.caltech.edu. https://doi.org/10.1038/ngeo1205

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