Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: 
The speed of sound is the distance that sound waves travel in a given amount of time. The speed of sound in dry air at 20 °C is 343 meters per second.


Question: What is the distance that sound waves travel in a given amount of time called?
speed of sound
The distance that sound waves travel in a given amount of time is called the speed of sound.