Yea, 13 for me. Should be a very easy test for anyone with a GCSE-level education in the sciences and all of this is covered pre-options (at age 13/14 when you pick which subjects you want to study).
I know that most respondents have been US citizens: I wonder how us Brits would stack up..?
I know that most respondents have been US citizens: I wonder how us Brits would stack up..?
Sum ergo sum