What are you doing? Regarding course. Those sound like SACE subjects.
Also what school are you at?
They are all good subjects, (not sure about earth environment science, its the first year its happening I think as it was previously called geology), you shouldn't have any problem with scaling.
Also, what english are you doing. literary study? as a second language? or...
but all in all, if you get an A+ in them, they will stay an A+.
According to what i know about SACE, many people do well in biology so an A would not be 14/15, but maybe 13.5/15.
Nonetheless, if you do well, it shoudnt affact your subjects.