Tuesday, April 15, 2014
Solar Cooker Update
My group and I had to build a new solar cooker because the person in charge of taking ours home never came back to school. So now our solar cooker is a box full of tin foil and mirrors reflecting sun light into the pan. I learned that you should always have a sturdy box so the wind does not blow it over. Now we brought a weight to make sure it wont blow over. I think our solar cooker will be successful if we make the hole box sturdier.
Wednesday, April 9, 2014
Miracle of Water- Extra Credit Bingo
Earths surface is made up of 70% water. Very few planets contain any type of water. Water is a great temperature stabilizer. It can absorb a ton of heat and then absorb lots of cold. Without water you could not freeze ice cream or boil water to eat noodles. Water can also change its volume. At really cold temperature it grows until it freezez, when it is hot it shrinks. You never realize how much water can do until you actually live without it. God's made an amazing earth for a reason and he put water on the earth so that us humans can thrive and live without freezing to death.
Tuesday, April 8, 2014
Diamonds Burn
It's hard to imagine something so expensive could burn very easily. One scientist found taht burning diamonds would be easy using liquid nitrogen and some fire. Even though diamonds are hard, the chemical bonds that hold the carbon atoms in diamond together are weaker than the chemical bonds that hold together the other common form of pure carbon, graphite. The difference between diamonds and graphite is that diamonds chemical bonds create a inflexible bond where in graphite the chemicals are tightly bonded to make sheets stacked on top of each other. It is the chemicals bonds strength not hardness that determines how easily something catches on fire. If your house burns down with the jewels inside it , you can collect the melted gold, but the diamonds will be gone with a little bit of C02.
Source: Gray, Theodore. (10/8/2009) Gone in a Flash, 4/8/2014
http://www.popsci.com/diy/article/2009-08/burn-diamonds-torch-and-liquid-oxygen
Photo Credits: http://www.popsci.com/sites/popsci.com/files/styles/article_image_large/public/images/2009/08/diamond3.jpg?itok=i_Q530Po
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