The student who didn't even know how to read out the question to his phone a friends was very odd. Surely a languages student at Oxbridge should be aware of widely used Greek words
I thought he did exactly the right thing. You don't always need to ask the full question - it takes up such a lot of time. He just asked what "helio" meant - that was all he needed to know, because the question was about "heliocentric" and he knew what "centric" meant.
I'm always amazed they do usually ask the full question instead of just asking "Who did X?" etc. I've always thought I'd rather have the questions and then a delay in the answers being shown - I'd rather think about the question for a bit without being confused by four possible answers.