Simplify the following text for a Grade 11 native English-speaking person.
Original: They are generally identified by convention rather than any strict criteria , with seven regions commonly regarded as continents â `` they are ( from largest in size to smallest ) : Asia , Africa , North America , South America , Antarctica , Europe , and Australia .
Simplified: In general it is agreed there are seven continents : Africa , Antarctica , Asia , Europe , North America , Australia , and South America .