Science: Matter and Energy - Flashcard 14

Front

What is the main factor affecting the speed of sound in air?

Back

Air temperature.

Front

How does temperature affect the speed of sound?

Back

Sound travels faster in warmer air because the molecules are moving more quickly.

Front

What is pitch in terms of sound?

Back

Pitch is the perceived frequency of a sound; higher frequencies correspond to higher pitches.

Front

What unit is commonly used to measure sound intensity level?

Back

Decibel (dB).

Front

What is echo ranging?

Back

A method of calculating distance by measuring the time it takes for a sound wave to return after reflecting off an object.

Front

What happens to the speed of sound as air pressure increases?

Back

The speed of sound is primarily affected by temperature rather than pressure; however, at constant temperature, higher pressure can slightly increase speed.

Front

What is the relationship between frequency and amplitude in sound waves?

Back

Frequency determines the pitch, while amplitude determines the loudness of the sound.

Front

What is the difference between loudness and intensity?

Back

Loudness is the perceived strength of a sound, while intensity is the actual power of sound per unit area.

Front

What is timbre?

Back

Timbre is the quality or color of a sound that distinguishes different types of sound production.

Front

How does humidity affect the speed of sound?

Back

Higher humidity can increase the speed of sound because moist air is less dense than dry air.