Fill in the blanks:
1. Metals produce
when hit by
an
object.

Metals produce sound

when hit by

an

object.

i dont know what your question is me dont understand put a picture at least so i can see the question and answer it

Explanation:

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.