MTTC 103 Elementary Practice Exam 2025 – Complete Study Guide

Making a string phone is an excellent activity to help students learn how sound travels. This hands-on experiment demonstrates the principles of sound waves and vibrations in a tangible way. When one person speaks into one end of the string, vibrations travel along the string to the other person’s end, translating into sound. This physical representation allows students to visualize how sound can travel through different mediums (in this case, a solid string) rather than through the air, highlighting the concept that sound requires a medium in which to travel.

Engaging in this activity also provides an opportunity for students to explore sound intensity and clarity, as they can experiment with different lengths of string and varying tensions. Understanding these fundamental concepts through experimentation encourages deeper insight into the properties of sound and its medium.

Other options, while they do involve sound and could provide educational value, might not as effectively illustrate the fundamental concept of sound travel. For example, making a flute out of straws focuses on the creation of sound rather than how it travels, and using spoons on jars filled with water is more about the pitch and resonance of sound, rather than its transmission. Pouring salt on a balloon while playing music might produce visual effects related to sound but does not directly convey how sound travels in a