Question

• travel only through __________ • ______ waves: move material __________ to wave movement

Explanation:

This is about mechanical waves (a concept in Physics, part of Natural Science). Mechanical waves travel only through matter (medium). Longitudinal waves move material parallel to wave movement.

Answer:

• Travel only through \underline{matter (medium)}
• \underline{Longitudinal} waves: move material \underline{parallel} to wave movement