A prize-winning experiment conceived by Scots pupils is to be launched into space on Friday morning.

The bacteria test, which could help develop a cure for conjunctivitis, was designed by six pupils from Renfrewshire during Mission Discovery 2014, a week-long space school held in Paisley with the help of Nasa astronauts.

It will be launched from Cape Canaveral in Florida at 9.43am UK time as it heads to the International Space Station.

British astronaut Tim Peake will conduct the experiment after it arrives.

Former Nasa space shuttle commander Ken Ham worked with the pupils in 2014.

He said at the time: "A wonderful aspect of working with youth, particularly these ages, is that they come up with the most amazing ideas that none of us old adults can come up with on our own, so it could be from physical sciences to medical sciences, wherever your imagination can take you.

"Something that is useful for humanity and might be answered by an experiment in micro-gravity."