Teitl clawr = Cover title.
Trydan. Uned 5, Uned o waith i gefnogi addysgu, dysgu ac asesu prosesau ffisegol yng nghyfnod allweddol 2, gan ganolbwyntio ar ddeall cylchedau ac amrywiaeth o lif cerrynt. ISBN 186112371X. Published by Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru in 2001. Publication and catalogue information, links to buy online and reader comments.