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Physical ScienceGrade 6-8

Sound Waves and Hearing Answer Key

Learn how sound travels as waves and how our ears detect different pitches and volumes.

Looking for Sound Waves and Hearing answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Sound Waves and Hearing Gizmo.

100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026

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How Sound Works

Q1.What type of wave is sound?

Answer

A longitudinal wave - particles vibrate back and forth in the same direction the wave travels.

Q2.Can sound travel through space?

Answer

No, sound needs a medium (like air, water, or solid) to travel. Space is a vacuum.

Q3.What makes a sound loud or quiet?

Answer

Amplitude - bigger vibrations make louder sounds.

Pitch and Frequency

Q4.What makes a sound high-pitched or low-pitched?

Q5.Does sound travel faster in air or water?

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