**1.**

The wavelength of a wave is defined as the length of one complete wave cycle.

1. The wavelength of a wave is the distance between

A. two consecutive crests.

B. the rarefaction and the following compression.

C. the crest and the following trough.

D. the amplitude and the normal position.

2. The maximum distance a molecule has been moved from its normal position by a wave is

A. frequency.

B. rarefaction.

C. amplitude.

D. compression.

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