Lander,+Zachary

Both Frankenscence and Myrrh are gum resins, that means they are from trees. People would tap a hole into the tree and remove the chemicals. They where both used as incense in burial tombs to remove the smell of dead, decaying, people. They both could be used as medicine. Frankenscence could be used to reduce the pain of arthritice. Myrrh could be used to dull pain but it messes with the brain. Depth and perception were disoriented.

Zack, Looks interesting and a little macabre. 5 stars. MW

Redefining The Kilogram The standard Kilogram is just what it's title is. It is the standard for all weight measurement. The standard though has lost weight, about 50 micrograms over time. The copies of the standard though are still in good shape. There is one in the U.S.A. located in Maryland. The standards are use so no one gets a bad deal and pays more than how much it really is.

Zack, A little sparse here. Clearly define three points. 4 stars. MW

Motion Detectors. Motion Detectors are very helpful in this day of age. They run on three different connections. One is a light source, the sensor is aimed at another plate and when someone or thing walks threw it the light is triggered. Another technique is pulsation, the sensor sends out waves and measures the time elapsed till the wave comes back. When an object walks through it the wavelength is now shorter and the light is triggered. The last technique is infrared sensing. When an object that gives off heat the infrared laser picks up the heat change and turns on the light.

Zack, That's three things. 5 stars. MW