Starr,+Andrew

Andrew Starr:

I read an article about Trick Candles that keep reigniting. I didn't know that magnesium powder is incorporated into the candle’s wick, which is what keeps the flame lit. Also, I learned that magnesium powder is flammable at a low temperature. Therefore, the candle doesn't have to be that warm for the flame to reignite. I learned that Canada has actually banned the sale of these trick candles since 1977. I had already known that trick candles are frequently used at parties as fun jokes and gags. They are a fun way to blow out a candle. Trick Candles, even though are banned in Canada, are still legal in the United States, which I had known. I had also known that trick candles do tend to reignite the flame onto the candle.

Andrew, Looks good. I guess you have to be careful with those things! 5 stars. MW

Distillation Video:

I thought it was interesting how when you would heat the crude oil at different temperatures, the color of the distillated crude oil were all different. The hotter the test tube got, the more stronger or non-clearer the liquid of the crude oil was. It was interesting how they first started heating the oil with some hot water, then when the process got underway, they switched to using the bonsin burner, which then sped up the process of distillation. I wonder why the hotter the temperature of the burner was, the darker the liquid got.

Andrew, Good observations. The darker fractions contain more tar and asphalt. BTW it's Bunsen not bonsin. :) 5 stars. MW

Motion Detectors:

In this article, I had already known that motion detectors are used for lights or garage detectors. Also, I knew about the photoelectric effect because we had talked about it earlier in the year. Another thing that I had already known was that motion detectors have photo sensors that detect light. I learned that bats also have signals as well, but they send out theirs in the form of sound than light. I also learned that there are three different types of motion detecting devices. The last thing I learned was that all photo sensors rely on lights ability to initiate an electric current.

Andrew, OK. You covered the prompt. 5 stars! MW