Video and lesson investigations on the topic of the sound. Key concepts include:
- Sound travels through air.
- Ears are designed to detect sound.
- Sound can travel through some solid materials.
- Sound is made when things vibrate.
- Sound vibrations travel through the air.
- These vibrations can make other things vibrate.
- Vibrations traveling through solid materials can be detected by the sense of touch.
- Ears are complex and delicate organs.
- The outer ear functions like a funnel, collecting sound vibrations and passing them along the ear canal until they strike the eardrum, causing it to vibrate.
- The eardrum (or tympanic membrane) is thin enough to transfer vibrations to the bones in the middle ear. The auditory nerve, connected to the inner ear, then transmits these vibrations to the brain where it is interpreted by the auditory centers.