Using a series of very technical tests, scientists from the French research facility CEA have determined that the Earth's core is roughly 6,000 degrees Celsius. That is approximately 1,000 degrees hotter than the temperature obtained by tests in the 1990s.
These new figures show that the center of the Earth is just as hot as the surface of the sun.
The experiment that supplied the new temperature used X-rays to probe tiny samples of iron at extraordinary pressures to examine how the iron crystals form and melt. The BBC reported that "To replicate the enormous pressures at the core boundary - more than a million times the pressure at sea level - they used a device called a diamond anvil cell - essentially a tiny sample held between the points of two precision-machined synthetic diamonds.
Once the team's iron samples were subjected to the high pressures and high temperatures using a laser, the scientists used X-ray beams to carry out "diffraction" - bouncing X-rays off of the nuclei of the iron atoms and watching how the pattern changed as the iron changed from solid to liquid."
I think good teachers have mastered one important skill: time management.
Without the ability tomanage the hours ina day~ learning does not take place~ and educators do not accomplish their goals. To makematters worse~ teachers have incredible demands ontheir time.Loads ofpaperwork~ emergency drills~ new remedial programs~ specials classes~ assemblies~ morning announcements~ faculty meetings--the list goes on.
I have to admit~ sometimes it drives me a littlecrazy. I have...
The partnership between Microsoft and NBC is over. The news agency bought out the tech giant’s stake in MSNBC.com, putting to bed an online relationship that spanned 16 years.
The original arrangement paired NBC News' exclusive news and video content with Microsoft's technological expertise in a 50-50 joint venture between Microsoft and NBCUniversal. Because the two...
My classlearned some ofits most valuable lessonson the playground--with the teacher playing a very limited role.
Trust, cooperation, teamwork, handling pressure, losing with grace.
And it all happened by accident.
We would sneak out for recess once or twice a week (due to a tight schedule, an insane amount of attention on test scores, and other factors, recess does not always happen). Some of the boys began playing a game learned at physical education classcalled...
How do I get my son/daughter to do their homework?
As a teacher, you probably get this question often from parents.
Perhaps, the following might be of interest to you as a classroom teacher or parent.
Parents are an integral component in the success of their children in school and the issue of homework is a perfect example of this. As the parent, you must make school and doing homework a top priority in the course of a day, over sporting practice, lessons, etc. I...
Preschool classroom layouts tend to be much different than traditional elementary school desk arrangements. Spaces are needed, of course, for teacher-led time. But, children of this age are not developmentally ready to sit for long periods of time. They learn through play and interacting with other children. For...
If you’re reading this, odds are you are not one of the 570,000 people in the U.S. infected with the DNS Malware Virus. Congratulations. Yet, while you can still surf around to your heart’s content, ISPs are working overtime to help those less fortunate users find their way back to the information superhighway.
This morning at 12:01 the FBI shut down...
Decades after it was first theorized, scientists have proven the existence of the Higgs boson, or “God Particle” that is responsible for creating mass. The achievement confirms the standard model of physics and can potentially lead to explanations as to how mass in the Universe came to be.
The discovery was made by experiments running through the giant Large Hadron...
I am going to share with you the best advice I can give for creating good rapport with the parents of your students. It comes down to five simple words.
GET BACK TO THEM QUICKLY.
Thats right. If they call you, do everything you can to return their phone call that business day, even if it means calling them in the car on the way home, in between bites of your sandwich or during your planning period. If they send you an e-mail asking a question about their child, reply...
Alexander and the Terrible~ Horrible~ No Good~ Very Bad Day~ written by Judith Viorst~ is a story about Alexander who wakes up with gum in his hair and trips on his skateboard. His mom forgets to put dessert in his lunch box~ and his dentist finds a cavity! Anyone who's ever had a day they'd rather forget will love this cleverly illustrated~ laugh-out-loud account of one boy's day of misfortune. Alexander and the Terrible~ Horrible~ No Good~ Very Bad Day is...
"To fight and conquer in all your battles is not supreme excellence: supreme excellence consists in...