Seismology also demonstrates the Earth is a globe:
- Predictions are made on the basis of certain 'assumptions', one of them being the Earth is a globe.
- Predictions would fail consistently if the Earth were not a globe.
- Predictions do not fail constantly.
Ergo the Earth is a globe!
Seismic waves demonstrate the Earth is a globe:
- Primary compression waves travel at certain speeds in solid and liquid.
- Secondary sheer waves travel at certain speeds in solid but not liquid.
- Monitoring stations positioned all around the Earth pick up shock waves at expected intervals after a seismic event.
Ergo the Earth is a globe!
Tectonic plates demonstrate the Earth is a globe:
- We have mapped all of the plates on Earth and can measure their movements to the millimetre.
- They all touch another plate on all of their 'sides'.
- We can predict the movements of the plates based on how solid objects move over the liquid surface of a globe.
- The plates move just as the predictions predict.
Ergo the Earth is a globe.