I'm honestly not sure what your instructor expects there. The name of that procedure is the "streak test", but that doesn't quite fit in the sentence.
The streak of a mineral can distinguish between two samples that have the same color. The streak is often a different color. To test streak, use a streak plate. This is a piece of unglazed porcelain, like the back side of a tile.
streak.
In mineralogy, streak is the powder from a mineral when you rub it against a light colored hard surface. Streak is used to identify some minerals.
Rub it against something warm, generate heat to get back the circulation.
Electrostatic force of attraction!
When you rub a mineral on a tile it is called streaking a mineral. The line that is left is called the streak, and the tile itself is called a streaking plate.
By rubbing mineral against a piece of porcelain tile, the objective of the test is to observe the hardness of the mineral.
That procedure tests the streak of the mineral. Oddly, the streak color of some minerals are different from the mineral's color.
The streak of a mineral can be determined by rubbing the mineral against an unglazed porcelain tile to produce a powder. The color of the powder left behind is the streak color of the mineral. It is important to use a streak plate or tile with a hardness greater than the mineral being tested to prevent contamination.
it proves its streak
The test described is called a streak test, and indicates the true color of a mineral as observed in a powdered form.
The test is called a streak test and it leaves a powdered form of the mineral on the porcelain. The powdered mineral reveals the true color, of the mineral specimen, which may or may not match the color of the specimen.
it is determined when you rub the mineral on a hard, rough, white surface.
The streak of a mineral can distinguish between two samples that have the same color. The streak is often a different color. To test streak, use a streak plate. This is a piece of unglazed porcelain, like the back side of a tile.
To obtain a minerals streak you would get a piece of the mineral and rub it against something that is strong enough to erode a little of it.
To find the streak of a rock, you can rub the rock against an unglazed white porcelain tile to observe the color of the powder left behind. The color of the streak can help identify the minerals present in the rock.
A streak plate, or unglazed white porcelain tile, is used to perform streak tests which can help to identify minerals. Rubbing the mineral on the streak plate will finely powder it and reveal the color of the powder, which in some cases is quite different from the color of the mineral. Eg: hematite is black but has a red streak - a good way to tell you have hematite instead of one of the many other shiny black minerals.