Welcome to MooMooMath and Science. In this video, let's do some tests on some minerals to see if we can identify them. And we will first go through color.
Like for instance, we'll look at the color of this. This would be red. And then after that, what we're going to do is we'll test our hardness. We'll use our fingernail. We'll use a penny, a nail, some glass.
Okay. Then we'll do a streak test using either white or black. We'll test for magnetism and then we'll see if there's any reaction with a very mild acid. So let's get started with our first rock.
Okay with mineral number one the color is kind of green and white. Okay next let's check the luster. The luster appears kind of greasy or pearly. Next, let's check the streak using a streak plate. And the streak is, you can tell, white.
From the streak test, let's try hardness. I'm going to try to scratch it with my fingernail. Remember, I could use the penny, the nail, or the glass. So I'll try with my fingernail.
And my fingernail scratches it. So I would say its hardness is probably around 1. Let's see if it's... magnetic no and then let's see if it will react with a weak acid i have vinegar in here and it does nothing so there is mineral one i will have a answer key and a guide in the notes below so check that so as you go along you can take your best guess and then check your work okay here's our next and color wise it's kind of almost glassy color it almost like reflects light back it's luster definitely is glassy okay next let's try a streak and I got to be really careful with this but streak wise kind of a you can see right there kind of a very dull white okay next let's try hardness and i can scratch it with my fingernail but I can scratch it with my penny.
So I would say it's between 1 and 2. And then as you can tell, it has very extreme cleavage. So there's this one. Let's check and see if it's magnetic. No.
And let's see if it reacts with an acid. No, so there's this mineral on to the next one. Okay, we have our next mineral you can tell it's kind of a blackish Red its luster is almost metallic if you Shine it just right.
Okay. Let's check the streak using a streak plate and You can't tell there but Streak looks brown. Here's the streak.
Streak is brown. Next, let's try the hardness. I can't scratch it with my fingernail.
It scratches a penny. A nail. will not scratch it.
Let's try the glass. It scratches the glass slightly, so I would say its hardness is somewhere around 6, between 5.5 and 6. Let's see if it's magnetic. Oh, absolutely. Very magnetic.
Okay, and then finally, let's see. Does it react with an acid? No. So, there's that mineral.
Let's move on to the next. Okay, our next mineral, you can obviously tell it is a white color. Okay. Next, I would say the luster is between glassy and, let's try, earthy.
Okay. Let's see if it leaves a streak. Flip this over. and it leaves a very distinct white streak. Okay, hardness.
It will scratch my fingernail barely, but it is scratched. I don't want to try the nail. I jumped ahead. Sorry.
It will be scratched by the penny. So I would say the hardness is between 2.5 and 3. Now let's see if it's magnetic. No. And then let's see if it will react to...
Okay, I see a tiny, tiny bit of fizzing, so it reacts very slightly to acid. Our next mineral has a white color. I would say the luster is almost glassy or virtuous.
Let's see if I can leave a streak. In fact, it has no streak because it scratched the streak plate. So I can say it has a hardness of 7 because it scratched the plate.
It is not magnetic and no fizzing at all. On to the next mineral. Our next mineral color is green with some gold looking crystals.
Very nice luster. I would describe it as metallic. Reflects light.
Next let's try the streak. It is. Here's a nice streak, blackish brown.
Okay, now hardness. Obviously, it is not 7. I'm going to jump, and it will scratch a penny. Whoops. A nail does not scratch it, so let's get to the glass plate. And...
It scratches the glass plate. I know it's hard to see, but it scratched the glass plate, so I would say it is around 6. It is not magnetic. And no reaction with an acid. Next, obviously this rock is red. I would say its luster is dull.
Okay, streak. Oh, look at that. That's a very nice red streak.
Now let's try its hardness. I can already tell it's going to have a hardness greater than 3. So it scratches the penny. I'm going to go ahead and jump to the glass. And it scratches the glass.
And since it left a streak, I know that it's less than 7. I would say its hardness is 6. It looks like it should be magnetic. But it is not and no reaction at all to the acid.