
Originally Posted by
mattweather
I will be grade 11 next year and i will study all sciences, 2 unit maths plus extension, standard english and need energy for sport and reacreation class!
When I was in 11th grade (and 12th), I was first string on the varsity basketball team. Exhausting practice every day, two games a week against rival schools. We were undefeated in league play when I was a senior. Man, was I in good shape. The older I get, the better I was. 
I still always did my math homework and got straight A's all the way through high school (and always did well in English, apparently), still you have to be looking to get straight A's in all your classes; they're all important. I didn't do that well through college, myself. Too much surfing, I guess.
Got a degree but quit too soon. So I made up for it by marrying someone who graduated her first four years of university summa cum laude. That means she aced her undergrad years. That's what you want to be doing. Actually she then worked a few years, then went back and got her PhD and tenure-track position and huge chunk of NSF Young Investigator's Award funding. But any way you do it, the earlier you get the PhD, the better.

Originally Posted by
mattweather
In 2009, if i get passed the HSC UAI mark of 81% or higher to extend into university in Brisbane to study Geographical Information Science. It including biodiversity, earthquakes/volcanoes/tsunamis tracking, severe weather tracking plus many more that is natural disaster.
Well, I don't know what the HSC UAI is, but your chosen area of study sounds fantastic, and rather remarkable to have it nailed down so well while you're in the 11th grade. The study of climate and weather is an entire field in itself. There is certainly room in the study of complex systems for major developments. Let me know if you want an editor when you go to publish. 

Originally Posted by
mattweather
Professional opportunities are:
GIS (Geographical Information Science) Technical officer
Planning officer
Research Officer
Teacher, and
Natural Resource Analyst.
That what i am doing for!
There's no reason to settle for anything less than the top. The straight A's and high test scores are for getting scholarships to keep going through school (at least in the U.S.). Don't stop until you get a PhD, and then find a university position where you can teach a little and do cutting-edge research on the specialty you focus on, write proposals for funding, attract PhD candidates to help you with your research and publications, advise and graduate PhD students who go on to become other professors doing research in areas you helped turn them onto, go to conferences in Canada or Japan or Italy, do any of those things you have listed above, if you still want to.
I'm sure you'll make it.
Everyone is entitled to his own opinion, but not his own facts.