CALCIUM!
Calcium's elemental number is 20, with an atomic mass of 40. It is an alkali earth metal whose name derives from the greek work calcis, meaning lime. It is the most abundant element found in our bodies. The earth's crust is made up of 3.5% of calcium. When I think of calcium, I typically think of bones and teeth. The uses of this element are also vital in the make up of shells. It can also be found in chalk, limestone, and marble.
Avogardo's Hypothesis:
I had a few problems with the site since it wouldn't let me show the correct answers. But the answers that I did chose are displayed below:
Which of the following is not a characteristic of an
hypothesis?
it lets us make predictions that can be
experimentally tested
like a theory, it may be revised
when it is well established it will become a scientific law
it suggests a cause - effect relationship to explain why some event occurs
like a theory, it may be revised
when it is well established it will become a scientific law
it suggests a cause - effect relationship to explain why some event occurs
Consider the following combining gas volumes: Chlorine 50 mL
Oxygen 25 mL
What formula is suggested by the combining ratio of these gases?
What formula is suggested by the combining ratio of these gases?
| Cl2O ClO2 Cl5O2.5 Cl50O25 none of them |
Which of the following statements is true?
Equal volumes of gases contain equal numbers
of particles
Molecules such as O2 cannot exist because their like particles would repel
According to Dalton the formula for ammonia would be NH
When Avogadro made up his hypothesis, he was a lawyer for the Catholic church
Molecules such as O2 cannot exist because their like particles would repel
According to Dalton the formula for ammonia would be NH
When Avogadro made up his hypothesis, he was a lawyer for the Catholic church
Molecular Medicine:
I find molecular medicine to be very interesting! It's amazing how far we've advanced in technology, to the point where robots can be programed in our bodies to attack certain cells. However, I'm still apprehensive about the whole approach. If something were to go awry, the consequences could be fatal. And as someone mentioned in class, it could almost be a way for the government to control us even further (just a thought). I think while the idea is still good and the intentions are there, I don't know if I'd be the first one to volunteer to be part of molecular medicine...mainly because there's still just so many unknowns.
Extra Credit:
Journey to the centre of earth is a project that is still being worked on today. This site http://www.jamstec.go.jp/chikyu/eng/CHIKYU/index.html goes into depth about the project and what their mission is. According to an article on CNN, it explains the importance of reaching the earth's mantle. The reason being it will tell how the planet works, and why things such as earthquakes, volcanoes, and continents work. They predict that we will reach earth's mantle sometime by 2020, and they've already spent about a billion dollars on this project (http://www.cnn.com/2012/10/01/tech/mantle-earth-drill-mission/)
Excellent pictures you've found. It is so bizarre to think that a substance so metallic looking can be such and essential part of our make up. Surprised we don't look more like futuristic terminators than humans.
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