Basil's bone density = 1.64 g/cm3 Through research you determine that the average bone density is 1500 kg/m3. You want to compare Basil's results with the average, but you cannot directly compare because the scale is different.

Convert the average bone density value to g/cm3.

the dependant variable is spilled water

the independent is the heat

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.