Can someone help? My chemistry teacher dosen't teach us anything and this is due tommorow. I'll link more photos in other questions just check my page. It will only take one photo per question on my phone. I'll mark branliest if you can explain how to do this before tommorow.​

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.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)