8
food color is dropped into water to give it
color.
is it a chemical or physical change

Physical change

Explanation:

Food color is dropped into water to give it color. Physical because color is added and there was no reaction or energy used. Chewing food to break it down into smaller particles represents: Physical because the food is just being broken down

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.