Any temperature on the kelvin scale can be changed to celsius degrees by
a. subtracting 100 from it.
b. adding 212 to it.
c. subtracting 273 from it.
d. subtracting 32 from it.

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.

b) nuclear ive learned that in a pedtrodic table

plasma - state of matter made up of electrically charged particles