Moving Cellular Material

Passive Transport:


Passive transport works by diffusion or osmosis. 
Diffusion is like when someone sprays like Lysol or febreeze. Where the lysol is sprayed that is the high concentration area. Then once the lysol spreads around the room that is called low  areas. 


Osmosis is when water molecules are diffused across the cell membrane

Active Transport: is like passive transport but it needs energy to work because it pushes the molecules along the cell membrane.

Facilitated Diffusion:is a type of passive transport that allows stuff to cross membranes.

Endocytosis is when a solid or liquid enters a cell.And exocytosis is when a solid or liquid exits a cell. 

After Caffine

 

Cells

prokaryotic cells

Bacteria is an example of a prokaryotic cell.  

prokaryotic cells do not have a membrane bound nucleus.And pro-karyotic is Greek for before nucleus. Besides bacteria some algae are prokaryotes.

Eukaryotic Cells

Eukaryotic cells make apple trees, mushrooms and dust mites. They have areas called organelles that live in the eukaryotic cell. Different organelles have different roles in the cell like the mitochondria makes energy from food molecules, lysosomes break down and recycle organelles, and the endoplasmic reticulum builds membranes and transports protein throughout the cell.  

2012!!!!!!!!!!!!!! Year Of Death

Hello everybody are you ready for 2012 because alot of people arent but it could be true.








Official2012Countdown.com

Now on to something less depressing. So everybody just came back from break but wanted it to last longer. It was so much fun we had christmas and i got alot of really cool stuff I stayed inside all day playing with my new stuff.




Then we celebrated my brothers birthday and went out to eat it was so good. But my brother has the best birthday ever its on New Years eve. He is so lucky because everybody is celebrating his birthday and they dont even know it.



Then I stayed up till midnight and watched the ball drop on T.V. and ate a huge chocalate cake. Then our neighbors were setting of fireworks so I watched them. And stayed up really really late talking to friends and got like an hour of sleep.



So in this new year I would really like to get all A's or all good grades. So thats it bye.

ROBOTS ARE TAKING OVER!!!!!!!!!!!!!

Hello people today we will talk about something that been around for a little while robots. People have been talking about robots for a long time its said that Leonardo DaVince had talked about a machine that looked and acted like a human. Nobody knows if he ever built this machine.

When you usually think of robots you think of a movie where a mad scientist makes a robot and then it gets smarter and takes over or a robot comes from space and tries to destroy humanity. And this is one of the reasons I think robotics isn't advancing like it should because people think that they will take over the world.

Robots do alot of good for us they can build thing faster and better than us. They can also go places we cant go like the bottom of the sea or to a far planet in space. Like the Mars rover it roves around Mars but we cant send humans there because theres no way to bring enough food and water so we send a robot because they don't need food or water. And with robots we can learn way more stuff but without them we would hardly know anything.

When you think of robots you usually think of something computerized and mechanical but there are other types like soft bodied air pumped robots. That are made out of some kind of gel and how it works is it has tubes connected to it that pump air to different sections to let it move.  Click here and here

My Fav Elements

Today I am going to talk about some of my favorite elements.
CAUTION!!!!!!!!!!!!!!!! SOME ELEMENTS MAY BE VARY DANGEROUS!!!!!!!!!!

Mercury


So first I'm going to start with my favorite Mercury it is the only metal that is liquid at room temperature. Mercury was and still used in thermometers and thermostats. Even though mercury is a liquid it can turn solid when frozen. But it freezes at -40 degrees Fahrenheit.

Polonium


Next is polonium it was discovered by a polish scientist named Marie Sklodowska Curie in 1898. Polonium is a radioactive foil that is used in antistatic brushes, spinthariscopes, and spark plugs. Polonium does sorta expire. Like in the anti static brushes they had expiration dates.

Titanium 


Titanium was discovered by Reverend William Gregor in 1791 and named it after the greek titans. Titanium is used in lots of tools, knifes, and airplane parts. Titanium is great for lots of stuff because it is very strong and very light.

Americium


Americium was discovered by Glenn T. Seaborg, Ralph A. James, Leon O. Morgan and Albert Ghiorso in 1944. The only real use for americium is in smoke detectors they detect the smoke. Besides that their is really no use for it.


                                               


                                               THE
                                                    END 

9/11

Hey today we will be talking about something very sad 9/11. I'm sure allot of us know what 9/11 is all of us were alive when it happened. Well what happened is that 4 planes were hijacked two of them flew into the twin towers the first plane hit the north tower at 8:45 a.m. the second one hit at 9:03 a.m

 At 9:37 a.m. the third plane crashed into the pentagon then at 10:03 a.m. the fourth plane crashes into a field in Pennsylvania.

Since 9/11 we've been way more cautious and have way tighter airport security. I think in the future people will look back at this and remember all the people that died and how we fought. There aren't many good things about 9/11 but one of the best things about it is that when it happened we all came together.

Democritus Vs. Aristotle

Democritus

Democritus was a Greek philosopher who started research on atoms and matter 2400 years ago. His theory was matter could not be divided forever eventually you would be at the smallest piece possible. And his theory was ignored for 2000 years because of Aristotle's theory.

This is what they thought the atom looked like

Aristotle

Aristotle believed in the four elements. Earth, water, fire, and air and he  showed this by burning a log. The log is earth the fire is fire and the smoke is air and he put the fire out with water. And the people back then believed him because  it was easier to understand and they could see it with there own eyes.