How smoking is bad for a human body.

There are tons of disadvantages of smoking and no advantages. Did you know that smoking harms nearly every organ in the body! Smoking can cause many different types of cancer as well. There are hundreds of harmful chemicals in cigarettes. There is tar in them. Tar is the black, sticky stuff that people put on the edges of roads when building them. Can you imagine that going into someone's body! Smoking also causes heart disease, arthritis, and stroke. Smoking makes stroke and heart disease 3 times more likely and doubles the chance of arthritis.. It can also effect vision. Smoking leads to cataracts and optic nerve damage, which are both factors in blindness. Smoking is one of the leading causes of death. It has more deaths per year than drugs, alcohol, and car crashes. Combined! Smoking can also weaken bone density. It makes your bones more likely to fracture. Smoking is horrible for your body and you should never do it
http://betobaccofree.hhs.gov/health-effects/smoking-health/
http://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/effects_cig_smoking/ 
http://www.heart.org/HEARTORG/GettingHealthy/QuitSmoking/QuittingSmoking/Smoking-Do-you-really-know-the-risks_UCM_322718_Article.jsp 

Nikola Tesla

Nikola was strange. When he was 7, he started seeing visions. It was part of a mental illness he had for the rest of his life. He was born in Croatia on July 10, 1856. It’s ironic that he was born during a lightning storm, because he would invent things related to electricity. In the 1870's, he went to a college in Graz, Austria. Tesla came to the US in 1884. He worked with Edison for a short time. After that he invented the Tesla coil and AC electric current. Then he went to work with George Westinghouse. Tesla invented lots of things. Tesla invented the Famous Tesla coil, electric oscillators, and the first hydroelectric dam. He also experimented with radios and x-rays and he improved the light bulb. One thing that most people that have heard of Tesla don't know is that he came up with the idea for the smartphone.

In his last years, Tesla worked on inventions. He died in New York on January 7, 1943. 

http://www.history.com/topics/inventions/nikola-tesla
http://www.biography.com/people/nikola-tesla-9504443#death-and-legacy 
http://www.pbs.org/newshour/rundown/5-things-you-didnt-know-about-nikola-tesla/ 

Brazilian Wandering Spider

This is my 4th Vlog i forgot to post it but the redback spider is the 5th Vlog. i just posted these two out of order. watch it by me EZR HERE!

PechaKucha

This is the link to my PechaKucha about 7 scientists. Click HERE.

Hubble

Here is my presentation on Edwin Hubble.

Leonardo Da Vinci

Here is my presentation about Leonardo Da Vinci along with my 3 sources.

Why you need a spacesuit!

So I was thinking of a topic for a blog and I did something about space yesterday, so let's get into this:

Why do you need a spacesuit, and more important, how do you die in space?

To answer this, we must first know why we don't need a special suit for living on Earth. This is because of the atmosphere. The atmosphere controls temperature, causes tons of air pressure (which we need to survive), and protects us from the sun's radiation. So if we go away from the atmosphere, none of this will be there. But you won't die instantly. In fact, you can survive if you've only been outside for around a minute. You would be unprotected from the sun's radiation and because of the vacuum, you would swell up. You wouldn't explode, though. Also because of the vacuum, the boiling point of bodily fluids becomes less than 96.8 degrees Fahrenheit, so your blood would boil. All of this would take a while, but you know what wouldn't? Asphyxiation, or lack of oxygen. In fifteen seconds, you would be unconscious. After 90 seconds, you'd be dead. Holding your breath will actually make it worse, as it can rupture your lungs.
In a vacuum accident in 1965, a person survived similar things as this. He remained conscious for 14 seconds and his last memory before passing out was the spit on his tongue starting to boil.

Hope you learned something and always wear a spacesuit,

James

Sources:

• Don't try this at school (it's a youtube vid)
• More info
• Even more info