a non example of a streak is what it does not make a marking
Well , eating pizza (:
Nonexamples are instances or cases that do not fit a particular concept or category. For instance, if the concept is "birds," a nonexample would be a cat, as it does not possess the characteristics of a bird. Similarly, if discussing "fruits," a nonexample could be a potato, since it is a vegetable and not classified as a fruit. Nonexamples help clarify and reinforce understanding of what a concept is by highlighting what it is not.
bone,
circle, sphere, oval
a non example of a streak is what it does not make a marking
Color Speed Sound
a non example of a streak is what it does not make a marking
a non example of a streak is what it does not make a marking
The streak of an opal is typically colorless due to its amorphous structure. It doesn't leave a visible streak on a streak plate like some other minerals do.
Very hard minerals like diamonds can leave no streak because their hardness prevents them from being scratched by the streak plate. Since the streak test involves rubbing the mineral against a surface to leave a streak, extremely hard minerals won't leave a streak behind because they are tougher than the testing material.
A banana is a very good example of a nonexample. It has nothing whatsoever to do with rates, and so nothing to do with unit rates.
Streak is not used to identify every mineral because some minerals have the same color streak, making it unreliable for differentiation. Additionally, some minerals are too hard to leave a streak, while others may create a variable streak due to impurities. As a result, streak is just one of several properties used to identify minerals.