What are some benefits and risk of using cell phones?
In America and other countries many people use cell phones. A cell phones are a good to use because we can communicate with our families in case of emergency but we are in risk of setting get a brain tumor using a mobile phones. A scientific community from the World Health Organization says the people who use mobile phones are in danger of possibly getting carcinogenic radiation. The World Health Organization investigated and searched the possibly the people get cancer as well the International Agency for search on cancer and IARC. For a long time scientific community has studied and searched about brain tumors. They’re found a possible connection between mobile phones uses and malignant brain tumors. After the scientific community or searched found the brain tumor, Dr. Jonathan Samet announced five billion people around the world usually use mobile phones, and they are in most risk with the greatest use of cell phones. And exposure of radiation.
After a search scientists found brain tumor to come from various devises, including wireless phones, they also check the physical phenomenon where they found the exposure might perturb biological system and lead to cancer in the brain. A scientist are doing a search in France and they are reviewing all the previous studies done on electromagnetic radiations and that effect on humans but they found it also has an affect on animals. The scientist Camilla Rees is a founder of a U.S Electromagnetic Health. She
focused on brain cancer. Also she found there are many other health effects of radiation including damage to human cell tissue. She also said the scientist has to make a campaign to protect children’s of effects of electromagnetic field and particular from cell phones.
Finally the most at risk is people who may get brain tumor using cell phones because electromagnetic fields. However the cell phones are a good tool use for to communicating with some of our families in case of emergency. My opinion is we can use cell phones but taking care about our health because we can get cancer or brain tumor.
The benefits and risks of using cell phones
Heavy Use of Mobile Phones Increases Cancer Risk that radiation from cell phones can possibly cause cancer. For example, a scientific report released Tuesday by the World Health Organization concludes radio frequencies and electromagnetic fields - including those routinely emitted by mobile phones - are "possibly" carcinogenic to humans; and Dr. Jonathan Samet said: "the working group classifies the radio and electromagnetic fields as possibly carcinogenic to humans; that is within the classification used by the International Agency for Research on Cancer"; Also Rees says: "there are many other health effects of radiation, including damage to human cell tissue, that the World Health Organization has yet to recognize." In conclusion, radiation from mobile phones and wireless phone has been divided as possible cancer risk and effect biological systems by the World Health Organization.
Cell phones are an integral part of peoples’ lives. It can be one of most dangerous devices on the market today, but it also brought a lot of benefits to us. For example, cell phone emit radiofrequency energy a type of electromagnetic energy that could be biologically damaging to the body, and it can cause structural damage to the cells in the human body, then it will lead to the cancer. Also there are many expensive cell phones are often stolen, and people may be mugged for their phones. However, cell phone communication can be a good way for people to communicate with friends, and it can offer freedom. As the technology improved, it becomes a good way to entertainment. It also provides important safety benefits in emergency services. In conclusion, cell phones are very useful in today's time, but I think we should try to reduce its use because it is also harmful.
After i watched the video about Lewis dot diagram, the good things about it is learning how to draw the lewis dot diagram, it gives the clear example and use the periodic table to explain how many valence electron does each group have that we can draw easierly. But, i'm confuse how to draw lewis dot molecules, he just shows the easy examples and he didn't explain how can we understand ther're shared, i think he should give some example of Ionic bond that we will got more.
This website is about Moles: http://www.khanacademy.org/video/the-mole-and-avogadro-s-number?playlist=Chemistry
This one is about atoms and the elements:
By: Rubaiya Sarmin
Surgery is good for people body.
The surgery has lots of good idea. That helps people body very soon bariatric surgery control the two type of diabetes and shrinks the stomach. I think umbrella tern is a different surgery that help to make stomach smaller with the bypass surgery control the diabetes. When they use insulin is control the blood sugar. So we could get a save life after surgery. All the doctors are saying that bariatric surgery is for stomach to control tupe2 diabetes. Bariatric surgery’s umbrella Terni is different surgeries make stomach smaller. Surgery way to control diabetes that some doctors are now promoting gastric bypass. Insulin to control blood sugar levels the body from using.
Surgery is made people healthier very soon. I think the bariatric is good because they control the two type of diabetes and shrinks the stomach I think umbrella tern good for make small stomach. This is a good idea because with bypass surgery control the diabetes. This is good because with the insulin they control blood sugar levels. We could see here that of people are getting healthy when they have surgery. Surgery is good because when people have a surgery in their body is like clear. If people have a disease so when they have surgery they could bring the disease out side of body but when they gone take the pill the disease gone stay in their body may be is killed or may not. We are not sure about it. So think the surgery is better than pill.
after i saw the movie i saw i know how to draw the electron valence draw easyly.how they shared also how to give spme example oc ionic bond.so thats good for us to learn.
Comets Created Earth's Oceans
Water is the basic factor of life. Also, it’s very important for us. There are scientist who are doing research and investigating where Earth’s water came from. They came out with a hypothesis that water comes from Comet Hartley2. The way that scientists used to identify the sources of Earth’s water, they focus on comparing isotopes of the hydrogen found in the planet's water to isotopes of hydrogen seen in comets. Scientists used the European Space Agency's Herschel Space Observatory to observe the ratio of deuterium to regular hydrogen in comet Hartley 2. In Earth water, approximately 1,558 deuterium atoms are seen per 10 million regular hydrogen atoms. It approves Earth’s water may came from comets (Choi, 2011).
On Earth, water ratio contains about 10 million regular hydrogen atoms per 1558 deuterium atom. In addition, Comets Hartley 2’s has 1661 deuterium atoms per 10 million regular hydrogen atoms (Choi, 2011). This number is most closest to Earth’s water. Therefore, I think that our Earth’s water is most likely came from comet and it may be other factors or different answers. Due to the fact that our technology is not perfect. However, as time goes by, I believed that we will solve most of the problems that we face in science. I think it’s possible to have other living being in other planets because there are water in some other planets besides Earth.
Choi, Charles. "Comets Created Earth's Oceans, Study Concludes." 05 08 2011: n. page. Web. 21 Nov. 2011. <http://www.ouramazingplanet.com/1889-comets-water-earth-oceans-source-.html>.
What are some ways we can help the planet?
There’s many ways we can help the planet. For example instead of buying bottled water, use a water filter instead. There are some pretty strange options for filtration out there, but they can be very simple and easy to use. Therefore take a shorter shower. Furthermore recycle unwanted wire hangers,and recycle newspapers. Last but not least always turn off incandescent bulbs when you leave a room.
Overall we all knows that if we keep our environment clean then we will live a healthy life. Also there’s a lot of opinions why we need to save our planet. First of all buying a filter will save you a lot of money, then buying a bottled of water everyday. Also not spending a lot of time while taking a shower. Lastly not throwing newspapers away, because it will be used for something else later on. But if you throw it then you killing a lot of tree every time you throw it. My advice to everyone out there is if we want to help save our planet we need to stand up and take action by making sure we don’t throw away the things that will be use again. Also to try to keep the place their are living in clean. This is the only way we could save our planet.
“25ways to save the planet.” TreeHugger.ed. Collin Dunn. Wed,25,2011.
Where did Water originate from on Earth?
Find out the...
Water is very important resource that is needed on our planet. Life needs water in order to survive, to grow and to reproduce. In addition, 70% of our planet is covered with water but where did the water come from? Water is covalently bonded between two common elements hydrogen and oxygen. According to scientists water came from a comet is an icy small solar system that, when close enough to the sun, displays a visible coma and sometimes also a tail. In another word, water comes from and Hartley 2 comet has a similar ratio of heavy water to ordinary water as earth. The solar system contains hydrogen atoms and oxygen atoms most when both of the elements combine to form water molecules. Scientist believes water came from ice stars and they just exploded on earth to cool it down from the volcanic explosion. Also water is that valuable that, wherever there is water there must be life too. However, remote measurements of the water evaporating off of several major existing comets such as Halley revealed that their water ice was made of a different type of H20 (containing a heavier isotope of hydrogen) than Earth's, suggesting that these comets could not be the source of our water after European Space Agency sent a spacecraft to examine. As scientists also said when warmed by the sun, dry deep in the comet's body turns to gas jetting off the comet and dragging water ice with it. This concludes that water on earth came from comets. (Wikipedia, 2011)
the scientist wants to show us that the water originated from comets however, it does not have any clear explanation of where does the comet comes from and how are they formed into ice to be exploded on earth. In my opinion, no one knows where water
came from because we cannot prove our self with the simple explanation of comets and asteroids. As many of scientist believes in different hypothesis shows that no one exactly sure about how water ended up on planet earth. Also in my opinion, I think scientists need to prove how comets are formed into ice when they are dust. If Hydrogen is everywhere how can we not have water on other planet? Why is most of earth water salty? I think these types of question cannot be explained though science because it will always be mystery where earth got all its resources from.
The ozone layer protects life on earth from damaging solar radiation. We humans will face problems because of the hole that is opening in the ozone layer. However, starting from 1989, the Montreal Protocol stopped the use of ozone depleting chemicals worldwide and as a result, the ozone hole stopped growing. Also because of the atmosphere levels, the hole started to shrink. In addition, in the North Pole the ozone layer started to grow smaller. It is getting harder to predict the holes future size because the scientists found out that the ozone hole keeps changing from year to year. The depleting chemical gas is causing the problem and it is affecting people.
So, I personally think that the scientists should be aware of the change and do what they have or can do. To conclude this, the positive environmental laws has a successful change, however because of the negative affects of the aerosol use and the connection between the ozone hole and global warming will keep creating problem that will grow till the end of the century. Lastly, to prevent all of this , I think that we need to stop or at least do little things that will change our Global Warming.
I agree with what Ibrahima Bah said about keeping our environment clean by recycling newspapers, taking shorter showers and buying a filter instead of buying a bottle of water everyday.
We can also simply do little things that will help our environment. Such as, closing the tap when you are brushing. While we are brushing, we tend to forget that the water is getting wasted, so if we care to close the tap even if it takes a minute or so, we are making a big difference in our environment.
rouhi takhrayy ya fayha manzitsh nshoufak thanitlak ya fayha ya foohana takli daban fayha nti wlidak rouhi tboili azoul flawan alzmoidcnhewdhaosdnsiiah
Write something about yourself. No need to be fancy, just an overview.