On a cloudless night, I studied Pisces, a constellation in the North sky.

on a night which contained no clouds;I studied pisces. Pisces is a constellation of the zodiac and is located in the Northern celestial hemisphere

the dictionary definition of ubiquitous is "present, appearing, or found everywhere".

7

explanation:

it depends on what grade.

kindergarten to senior year in high school will go for about 7 hours. pre-k will go for bout 4-5 hours. college, it depends on your classes.