music: On which Beatles song did George Harrison play a sitar?

Questions

Which element derives its name from the Greek for 'bringer of light'?

How many feet are there in one fathom?

What type of rocks result from the wastage of pre-existing rocks?

How many thousand million tonnes of carbon dioxide are formed each year by the combustion of fossil fuels?

What is the term for the study of how the inherited characteristics of a human population can be improved by genetics?