GCSE Physics - Welsh Terminology (New) - WJEC
GCSE Physics - Welsh Terminology (New) - WJEC
GCSE Physics - Welsh Terminology (New) - WJEC
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Twll du Black hole<br />
Uwchnofa Supernova<br />
Y Bydysawd The universe<br />
Ymasiad Fusion<br />
Ymholltiad niwclear Nuclear fission