1. travels through different materials. 2. When objects make sound, they move back and This movement is called forth. through solids than 3. Sound travels : and gases. 4. Sound travels the through gases because the particles of are farthest apart. 5. If the particles of matter are very close to each other, sound wave passes quickly. This is . observed in materials.
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Answer:
1.Sound waves
2.longitudinal waves
Explanation:
3 and 4 ko nasa pic