Question

I can conclude that the mineral that the scientist found is harder than chalcopyrite, pyrite, and orthoclase, but not harder than quartz. I can also conclude that the unknown mineral is a relatively hard mineral.

Which ideas did you include in your answer? Check all that apply.
a) The unknown mineral is harder than the minerals that it was able to scratch.
b) The unknown mineral is not harder than the mineral that it was not able to scratch.
c) The unknown mineral is a relatively hard mineral.

Answer 1

The unknown mineral is harder than chalcopyrite, pyrite, and orthoclase, but not harder than quartz. It is also a relatively hard mineral.

Step-by-step explanation:

The ideas included in my answer are:

1. The unknown mineral is harder than chalcopyrite, pyrite, and orthoclase, but not harder than quartz. (It is harder than the minerals that it was able to scratch, but not harder than the mineral that it was not able to scratch.)
2. The unknown mineral is a relatively hard mineral.