Question

a wave is a pattern of motion that carries energy. when a wave travels through matter, the matter is called a medium.

eli is playing with a spring toy. energy from his hand is transferred to the spring toy, creating a wave. as the wave moves through the spring toy, the coils in the spring toy move back and forth.

complete the sentences.

when eli moves his hand back and forth, he transfers to the spring toy. the spring toy is the the wave travels through.

Explanation:

The text defines a wave as a motion carrying energy, with the matter it travels through called a medium. Eli's hand transfers energy to create the wave in the spring, and the spring is the matter (medium) for the wave.

Answer:

When Eli moves his hand back and forth, he transfers energy to the spring toy. The spring toy is the medium the wave travels through.