What is Sound?

1. Hearing

1.1. ears

1.2. ear drums

1.3. uses vibrations

2. Noise

2.1. yelling

2.2. music

2.3. rustling leaves

2.4. talking

2.5. burping

2.6. humming

2.7. crying

2.8. crunching

2.9. dragging

3. Sound waves

3.1. can move through liquid

3.2. there's different kinds

3.3. bounce off of things (echo)

3.4. vibrations

4. Energy