Notes are symbols placed on lines and spaces representing high and low sounds called what?

What are some of the ways african art connects the real world with the spiritual world?

Suppose that you are in a room with 3 doors and a crack in the ceiling for light. that is all. the doors each have a sign on them that says what there is behind them. door #1. a pool of corrosive acid. door #2. a crocodile that hasn't eaten in 8 months. door #3. a solar "oven". a giant lens that focuses all the sunlight at the entrance of the door. you must choose a door, which door do you choose?

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?