Peffer,+Rebecca

Motion Detectors The first thing I learned from this article is that there are three different types of motion detectors, some that use light, some that use frequency, and some that use infrared. However, one thing I already knew about this topic was that motion detectors can use infrared lights to sense warm blooded objects so, motion detectors don't work on snakes. Another think I did not know before reading this article is that radio waves are what set off automatic doors and police radar guns. Another thing I did know was that if you hold a piece of glass up to a infrared motion detector you can get past it without it noticing you (most of the time). The last thing I learned from reading this article is that our bodies give off infrared lights with a wavelength of 9-10 micrometers, which is how sensors detect us. Lastly, before I read this article I knew that snakes could see infrared and color, making catching prey easier. This article was very interesting!

Rebecca, I think you mean "some that use sound" not light. You have picked out some good points. Watch your sentence structure. 5 stars. MW

Video Response One thing I didn't know about crude oil is that it is unusable as a mixture, so before we can use it we have to separate the different compounds. One thing that is relevant to our class is that without crude oil we would not have a ton of things we need to carry out normal lives. Also, this is relevant to our class because we need to know how to separate different mixtures using distillation, like when we needed to separate water and copper sulphate. Something I found interesting was how complicated and necessary the process of separating crude oil is, because it creates all sorts of things we need like tar and fuel oil!

Rebecca, OK. Looks like you found some relevant information. 5 stars! MW

I read the article The Makeup of Mineral Make-Up, it was about what is in makeup and how those materials are chosen. One thing I found out in this article that I didn't know was that Mineral makeup is not all natural. Most of the powders and substances in mineral makeup are chemically processed or synthesized. Another thing I didn't know about mineral makeup that this article taught me is that the two main ingredients are Talc and Mica which are natural minerals. The last thing I learned was that mineral makeup was originally given to laser treatment patients because it doesn't irritate the skin. Something I knew before I read this article was that mineral makeup first came out around 1998. Another fact I knew about mineral makeup is that it is odorless because some fragrances have chemicals that cause reactions with the skin. The last thing I knew before reading this article was that mineral makeup is made from several different types of minerals not just one or two.

Rebecca, Looks like this article was interesting for you. Well written, good post! 5 stars. MW