Science: Matter and Energy - Quiz 14

Jackson is working on a project that involves detecting objects underwater. He uses a system that emits sound waves and analyzes the echoes reflected from submerged objects. This system is called ____.

• A) Sonar

• B) Radar

• C) Lidar

• D) Ultrasound

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While driving, Aria notices that the pitch of a passing ambulance's siren changes as it moves towards and then away from her. This change in a wave's frequency caused by the object's motion is the ____.

• A) Doppler effect

• B) Refraction

• C) Diffraction

• D) Interference

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During a science class, Isla measured the sound intensity level of a speaker. The unit usually used to measure sound intensity level is the ____.

• Decibel

• Hertz

• Watt

• Joule

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Michael is designing a new auditorium and needs to ensure the best sound quality. The study of sound is called ____.

• A) Acoustics

• B) Optics

• C) Thermodynamics

• D) Kinetics

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Charlotte is on a boat trip and wants to measure the distance to a nearby cliff. She sends out a sound wave and measures the time it takes for the echo to return. This method of calculating distance is called ____.

• Echo ranging

• Sonar

• Radar

• Ultrasound

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While watching a jet fly overhead, Scarlett heard a loud noise caused by a shock wave. This noise is a ____.

• A) Sonic boom

• B) Thunder

• C) Explosion

• D) Whistle

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Abigail is at a concert and notices that as the music gets louder, the effect on her ears is ____.

• Sound intensity level

• Loudness

• Pitch

• Frequency

James is playing a guitar and notices that changing the frequency of the strings affects the ____ of the sound he hears.

• Amplitude

• Pitch

• Loudness

• Timbre

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James is studying different types of sound frequencies in his physics class. He learns that sound with too low a frequency to be heard is called ____.

• Subsonic

• Supersonic

• Ultrasonic

• Infrasonic

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Michael and Luna are discussing why sound travels faster on a hot day compared to a cold day. The main factor affecting the speed of sound in air is the ____.

• A) Air temperature

• B) Air pressure

• C) Humidity

• D) Altitude

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