The largest sphere represents all of Earth's water. Its diameter is about 860 miles (the distance from Salt Lake City, Utah, to Topeka, Kansas) and has a volume of about 332,500,000 cubic miles (mi3) (1,386,000,000 cubic kilometers (km3)).
The average of your language test scores means absolutely nothing. All that matters is the individual scores in the 4 categories (listening, writing, reading and speaking). The Quebec program is the only Canadian Immigration program that will accept the academic version of the IELTS. We always recommend the general training since it is easier and universally accepted for proof of English language proficiency.
The IELTS band requirement for Canadian student visa is 6.5 minimum with no individual band less than 6. To get the score of 6.5 band on a scale of 9 is itself challenging. I don't think so for a student visa it should increase more. However, I have seen many Canadian colleges started accepting 6 band overall in IELTS.