Hannah creates a flowchart about the steps involved in hearing the sound energy produced by vocal cords. A flowchart with four steps. The first step is air moves past your vocal cords. The second step is the vocal cords vibrate. The third step is the sound travels into your ears. The fourth step is sound waves are created.

Which statement best explains the error in Hannah's flowchart?

The vocal cords cool down to produce sound energy.

Sound travels to your ears after the sound waves are created.

The sound waves create the vibrations in the vocal cords.

The vibrations of the vocal cords produce sound squares.

the answer is b & c i believe : )

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).