Rhythm - Bar lines

Look at the notes on this staff.

Suppose you needed to play a note from a particular section. The teacher would have to say something like "play the tenth (10th) note on the staff," and you would have to count from left to right until you found it.

Notes are easier to read when they are divided into groups. Notes are divided into equal groups with lines called bar lines. Bar lines are lines that divide the staff into equal parts.

The area (group of notes) between the two (2) bar lines are called the measures or bars.

Now the teacher can say, "Play the second note in the third measure," and you can find it more quickly.

MUSICAL RULE:

1. There is always a bar line at the end of every staff.
2. There is always a bar line at the end of every measure/bar.

3. Bar lines are not typically placed at the beginning of the music after the clef, key signature or time
    signatures.

4. There is a double bar line at the end of every piece or section. It is made up of one thin line and one
    thick line; with the thick one always on the outside.