4. The number of complete waves that pass a given point in a certain amount of time is called the wave's time. frequency. amplitude.

The number of complete waves that pass a given point in a certain amount of time is called the wave's frequency, often measured in Hertz (Hz). It's like the wave's dance speed—higher frequency means the waves are shimmying by faster, while lower frequency means they're taking their sweet time! Frequency has real-world implications, too! For instance, in music, different frequencies correspond to different notes. A higher frequency produces a higher pitch, while a lower frequency gives you deeper tones—think of it as the wave's way of setting the mood for your favorite jam session!