1) What is the medium in sound waves? a) Material sound travels b) Energy source c) Frequency unit d) Wave height 2) What does amplitude measure? a) Wave height b) Wave speed c) Wave length d) Wave frequency 3) What unit is frequency measured in? a) Hertz b) Meters c) Seconds d) Joules 4) What is resonance? a) Amplified vibration b) Sound reflection c) Wave bending d) Energy loss 5) What is an echo? a) Sound reflection b) Wave absorption c) Wave refraction d) Sound amplification 6) What happens during refraction? a) Wave bending b) Wave reflection c) Wave absorption d) Wave amplification 7) What is wavelength? a) Distance between waves b) Wave height c) Wave speed d) Wave frequency 8) What is the role of energy in sound waves? a) Moves waves b) Stops waves c) Changes frequency d) Alters medium 9) If a sound wave has a frequency of 500 Hz, what does this mean? a) 500 cycles/second b) 500 meters long c) 500 decibels d) 500 seconds 10) A sound wave travels faster in water than in air. Why? a) Denser medium b) Higher frequency c) Lower amplitude d) Greater wavelength 11) What happens to sound waves in a vacuum? a) Do not travel b) Travel faster c) Increase amplitude d) Change frequency 12) Which factor affects the speed of sound? a) Medium type b) Amplitude c) Frequency d) Wavelength 13) A sound wave has a high amplitude. What does this indicate? a) Loud sound b) Quiet sound c) Low frequency d) Short wavelength 14) What is the relationship between frequency and wavelength? a) Inverse relationship b) Direct relationship c) No relationship d) Equal relationship 15) A sound wave hits a wall and bounces back. What is this called? a) Reflection b) Refraction c) Resonance d) Absorption

8th Grade Mechanical Sound Waves Quiz

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