Fast which state of matter forms relatively rigid structures? select one: a. liquid b. gas c. solid d. plasma which matter exists in the solid state at room temperature? select one: a. star b. carbon dioxide c. baby powder d. water which matter exists in the liquid state at room temperature? select one: a. helium b. nebula c. shirt d. honey

1.solid

2.carbon dioxide

3.helium

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.

it is the most commonly accepted one