And as you'd expect with any must-have toy craze, some sellers are pushing the envelope to see how high the market will go: One listing was offering two sets of seven Hatchimals (14 toys total) for $20,000, and nearly two dozen other Hatchimals listings had Buy It Now prices of $5,000 or more.
Hearing is sensing with our ears the words that are being spoken. Listening involves our other senses to help us understand the words being spoken. When we hear we do it using our auditory system. When we listen we involve our auditory system plus our cognitive functions: paying attention, remembering, thinking and reasoning.
Sound can also mean a body of water, like a bay or channel. We can define a sound wave as a disturbance which travels through some medium. Sound is the term to describe what is heard when sound waves pass through a medium to the ear. All sounds are made by vibrations of molecules through which the sound travels. For instance, when a drum or a cymbal is struck, the object vibrates. These vibrations make air molecules move.