Maryland Education Standards. Sound is the energy objects produce when they vibrate. Sound energy is a form of mechanical energy. The substance that the sound waves travel through is called the medium. A medium can be a solid, liquid or gas. In a longitudinal wave, the particles of the medium move back and forth, while the energy moves forward. Then the particles are pushed together, it is called compression. When the particles are spread apart, it is called rarefaction.
The resources above correspond to the standards listed below:
MD.1.0. Skills and Processes: Students will demonstrate the thinking and acting inherent in the practice of science.
1.B.1. Applying Evidence and Reasoning: Review data from a simple experiment, summarize the data, and construct a logical argument about the cause-and-effect relationships in the experiment.
1.B.1.d. Describe the reasoning that lead to the interpretation of data and conclusions drawn.
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