Send us those science questions your parents stumble over.
Paddy Feeny will be phoning the lucky ones and putting them on the line to the resident scientists Patrick Moore and Professor Richard Gregory. This week's guest is Dr Tom Gaskell , who will answer questions on anything to do with the earth and the oceans: continental drift, pollution and mineral resources.
As usual, you can hear ARTHUR GARRATT with suggestions for some simple experiments.
As before, if you would like a chance to talk to the experts, send your question on a postcard, giving name, age and telephone number to: Dial a Scientist. BBC. Broadcasting House, London W1A 1AA Producer ALISTAIR BROWN