Using the mohs standard hardness scale, which of the following scratch tests is correct? scale mineral 10 diamond 9 corundum 8 topaz 7 quartz 6 feldspar 5 apatite 4 fluorite 3 calcite 2 gypsum 1 talc talc scratches calcite. quartz scratches corundum. fluorite scratches feldspar. topaz scratches quartz.

Topaz scratches quartz

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.

the answer is 303.15 or 303