At day 4 we’re nearly half way through the event. Hope you’re all chatting, asking and voting!
Today’s highlights in the Energy Zone:
- How to make solar cells:
gems : Matt: Is there something special in particular everday objects that can be easily used to make solar cells?
mattcarnie : You can make a solar cell from some glass, some dye and some pencils! There are videos on youtube on how to make them from donuts!
mattcarnie : Solar cells from donuts: «link»
gems : what special thing is there in donuts that means they can be turned into solar cells?
mattcarnie : You can extract a chemical from the sugar called titanium dioxide, this is a semiconductor. Watch the YouTube clip. Its fun!
- Pollution and species reproduction:
weheartzindzi : how will pollution affect species reproduction?
rhodrijenkins : That’s a great question. Pollution has been shown to affect fertility. Though the fact that it can kill outright is a bit more of an issue. There’s something in biology called “Eutrophication” (might have spelled it wrong), which basically says if you poison tiny animals a bit … then the animals that eat them will be poisoned. This poison builded up and becomes more concentrated the further up the food chain you get, evenutally killing some animals.
- And some great questions in ASK too:
How would you use coffee to make fuel?