.: all the info is in that strip on the back. i think the number on the front is just sequencial. wal-fart swipes your card when you buy booze. this is a gross breach of privacy and you should never let them do that.any states used your SSN for a long time, glad they changed from that!. What is typical is a set of letters and numbers based off of your name, and birth date. Other information may be included such as the location of where you got the license.
The streak test is most useful for identifying dark colored minerals, especially metals. How to use streak as an identification mark When testing for streak, the mineral must be crushed to determine the color of its powder. The color of the powder is the color of the streak.
Mineral Properties. What is streak? The streak of a mineral is the color of the powder left on a streak plate (piece of unglazed porcelain) when the mineral is scraped across it. The streak plate has a hardness of glass, so minerals with a Mohs Hardness >7 will scratch the streak plate and won't powder the mineral. Where do you observe streak? A mineralâs streak is determined by rubbing it on a streak plate, which is a piece of unglazed porcelain. The streak plate is essentially a type of glass, so it isn't used on minerals with hardness greater than 7.