The Earth on Thursday, April 14th 2011

Hey Everyone,

(The Earth from Space)
On Thursday I did my presentation on our very own planet, The Earth.

The Earth's name came from the English/German name which means ground.

The Earth's diametre at the equator is 12,756.32 kilometres. The Earth's mass is 5.97 x 10^24 kilograms. The Earth's density is 5.51 grams per cubic centimetre.

The Earth revolves around the Sun. It takes approximately 365 days to revolve around the sun.

The Earth is tipped on an axis. It is tipped on this axis approximately 23.5 degrees from vertical. The Earth rotates once in 24 hours. It does this at a rate of 1609.344 kilometres per hour.

Where we live on the Earth, there are four seasons. They are spring, summer, autumn, and winter. The least warm recorded temperature is -89.4 degrees celsius. The warmest recorded temperature was 56.7 degrees celsius.

The Earth's atmosphere is made many different gases. The Earth is 78% nitrogen, 21% oxygen, 0.003% carbon dioxide (This increases due to pollution), and other gases such as neon, methane, krypton, and hydrogen.

The Earth is the third planet from the Sun. The minimum distance is 146 million kilometres. The maximum is 152 million kilometres. The mean of this amount is exactly one AU.

The Earth was discovered aproximately 3 million years ago by the first human. I think that they just looked down.

The moon is the brightest object in the sky besides the Sun. The moon orbits around the Earth once a month.

(Each of the four lines symbolizes one of the four elements.)

Above you can see the symbol that stands for Earth. You can use this during Ms. D's class instead of writing the word Earth.

The Earth does not and probably never had rings.

Interesting Facts:

• The Earth is the densest major body in our solar system
• The Atmosphere of Earth extends about 10,000 kilometres
• Molten iron core makes a magnetic field
• Actually takes 23 hours and 56 minutes to rotate
• One Earth year is actually 365.2564 days. NOT 365
• The Extra 0.2564 causes leap years to occur

So that was my presentation on Earth. Here is a video that might tell you a bit more about the Earth:
http://www.youtube.com/watch?v=1V2J0oBj42Y&feature=relmfu

SCIENCE DAY, february 9th

So science day was last thursday and was chuck full of information. Our class was doing genetics. We had three different stations one was building dna out of candy which attracted all of the children, dna extraction which by the time I got there was no longer able to be done, and last we had the Traits of AISZ lab. During the traits lab all of the kindergardeners I interviewed would walk off to the candy lab after the first few questions. So what I learned from that was that the candy station was by far the most popular. A link to a video about dna extraction is here http://www.youtube.com/watch?v=p43UiNjytQQ . I don't think I need to link a video about the interview or candy Dna, but if you think I do tell me in the comments. Here are some pictures.

Now for the science behind the experiments. For the Dna extraction lab: So what happens is that the person will crush some strawberries in a bag then add the extraction buffer this is a mixture of soap and water. The soap helps remove grease and impurities. After that the person puts cheese cloth over the funnel placed on the test tube and pours the mixture in. Once this happens ethanol is added and small bubbles will begin to appear this is the dna. Traits of AISZ: This experiment is to see wether more people have the dominant or recessive traits such and hitchhiker's thumb(dominant) or do not have hitchhiker's thumb(recessive). And lastly the dna model building: dna is in the shape of a double helix and the sides are made up of dioxyribose and phosphates. There are four nitrogen bases within the dna Adenine, Thymine, Cytosine, and Guanine they pair up respectively. As I have previously said this lab has a tendency to attract the most people.

After an hour and a half we went to normal classes. After two periods we got back to science day, but instead of doing the presentations we went to see other peoples. First we saw the 11-12th grade. The two I went to were the wave length one which before they got the machine working was gravity hammer, and the equilibrium lab. The gravity hammer was a hammer being held up by a piece of wood and string. The wave length lab was a piece of string moving back and forth very fast and it showed a wave. The equilibrium lab was three popsicle sticks holding each other up. this could happen because all the forces on the sticks were equal. Other labs I didn't see were light refraction and lemon power. After 11-12th grade presentations we went to the tenth grade presentations. The tenth grade did theirs on nuclear power. They tried to convince people that it was a good thing and that a nuclear power plant does not make bombs. They convinced me and made me believe it is good.

Once we were done there we moved on to SK and the second graders. The second graders I saw were doing a lab about colors within colors. Such as in black there is all colors. I didn't get to see what the rest of the second grade was doing so please tell me in the comments so I can add it in. Back to science day. When we went to SK they showed us what floats and sinks, the other children did what rolls and stacks. After these exciting presentations we had to go back and do ours again for the parents. When it was all over and done we cleaned up and went home.

The next scribe is Vance.