My Summary of "A distant Earth-like exoplanet 'could have life'"

  In the universe, there is a Earth-like exoplanet which is just discovered by scientists.  This exoplanet planet named Gliese 581g and locates 20 light-year away in its star "Goldilocks zone."  The researchers from UCSC and Carnegie Institution of Washington have been studying a star named Red Dwarf near by Gliese 581g for 11 years.  Right now, Gliese 4581g is the planet that scientists found most Earth-like.  The mass Gliese 581g has a mass that is three to four times of Earth.  Gliese 581g orbits its sun in 37 days, and it is  a rocky world.  However, the average surface temperature of the planet is estimated about -12c to -31c.  The scientist has found nearly 500 other worlds other than our Solar System.  More information on http://www.bbc.co.uk/news/science-enviroment-11444022

Are non carbon based life forms possible? Why or why not?

  Every organism in this world contains carbon in their body.  However, are non carbon based life forms possible?  I disagree this statement because carbon is a main element in our bodies, so we are not normal people if we do not have carbon.  In addition, carbon is made up 18% huam body.  Carbon dixoxide also can control the aging process.

Should U.S. switich its measurment system?

 

   Several years ago, NASA failed its rocket, and main reason of this accident is because NASA did not use the same measure system as other countries.  In addition, a new issue occurred which is should U.S. switch the measurement to metric system.  I myself support this suggestion.  First, different measure systems can make the students chaotic, especially a immigrant student.  In China, everyone learns metric system; thus, the Chinese students do not know what are "mile", "inch", or "feet".  When I came to the United States fire\st time, I did not have the concepts of U.S. measure system.  Furthermore, various measure systems may cause some accidents, such as the issue of NASA.  On the other hand, the metric system is an international system, so most countries use this measure system. More informations on http://en.wikipedia.org/wiki/Metric_system

my goals of biology class and new school years

  It is a new school year, and I already become to an freshman at Alhambra High School.  My first goal of this school year is to gain more credits and have a high GPA.  In my biology class, I have to learn the knowledge as much as I can.  In addition, I will be a friend with all of my classmates and my teacher.