Feemster,+Santia

I read this article because my cousin is in the Makeup Industry. Some of the "Mineral Makeup" that's in the ads may not appear to be all that safe. Mineral makeup has no specific change than traditional makeup. Traditional makeup has additives and preservatives. Mineral makeup is mineral-based makeup that most dermatologist have at there offices. Boron Nitride is in most makeup. Mineral makeup is simply made out of powdery substances and has compounds that occur in nature. This article was very interesting because Mineral Makeup is almost the same thing as regular makeup. Mineral Makeup has minerals in it, but it has no specific change than traditional makeup, there is no difference.

Santia, Seems like mineral make-up might be better for your skin than regular make-up. It's probably more expensive though. 5 stars. MW

Redefining the Kilogram

I found many things that interested me in this article. First, I found interesting is that the kilogram is not defined as a physical property of nature. The kilogram is defined by a a physical artifact and is the last one of the SI units to be defined as that. Another interesting point that I found within the article is that they lock the kilogram in a volt. Why would they secure it within a volt? I don't think anybody would want to steal the kilogram. Is it worth a lot of money? I found that very interesting that they would do that. Lastly, I found out that the mass of the kilogram is equal to the mass of 5.0184515x10 to the 2512 power of C atoms. I wonder how you would weigh atoms if they are so small. Thats very interesting. This article was fun to read, it had a lot of good points in it.

Tia, It's vault not volt. Volt is a unit of electrical potential. Apparently keeping the kilogram safe is pretty important. I guess you could "kidnap" it and hold it for ransom? 5 stars. MW

Motion Detectors

I found many things interesting in the article Motion Detectors. One that I found very interesting was that there are three different types of detectors. One uses light, so when an object passes through, a light beam comes on. The second type uses pulses. It also monitors the reflection pattern. The last one listens to warmth. They monitor infrared radiation. Another thing that I felt was interesting was that the eye was a photo sensor. And lastly, I found that light behaves like a wave in some situations, but sometimes it behaves like a particle. I've always thought that light had to do with different wavelengths. Tia, You'll find that light act as waves and particles. It's called wave-particle duality. Pretty cool! 5 stars! MW