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."
A Place at the Table, released March 1, 2013, is a documentary that continues where the film Food Inc. left off. Directed by filmmakers Lori Silverbush and Kristi Jacobson, and produced by Top Chef judge Tom Colicchio, A Place at the Table tells the story of the 50 million hungry Americans who are struggling to feed themselves. A number that mostly encompasses families, that 50 million also includes the one in four...
We all know of school improvement initiatives that failed when they should have succeeded. Technology initiatives~ new evaluation systems~ even changes to the school calendar these are ideas that research suggests should improve student outcomes~ but for some reason~ in some contexts~ they don't.
One reason that many education initiatives struggle to succeed is...
When I was in China in 2011~ I brought one of the bears a student gave me when I retired. At first I felt a bit self-conscious when I took her out of my backpack to get pics of her at the different sights in China. My tour group eventually started to offer ideas for pictures and at our farewell dinner~ requested Purpleannie be in the group picture~ too!
Perhaps~ your students would like to see her China pictures at my website for teachers and kids:...
Call it a lesson in password protection. The parents of a five-year-old boy in England are regretting handing over their iTunes password after the youngster managed to rack up over $2,500 worth of purchases on the...
Have a great quote that you'd like to share with your students?
Many years ago~ Dick's Sporting Goods had a commercial with a quote that I thought really summed things up...
"Life is not a Spectator Sport!"
I tried to instill that thought with my students. "Use ever day to the fullest. Read~ try to make someone smile~ help someone~ say a kind word to someone~ dream things you d like to do and work to make them possible AND and at the end of the day~ be able to say~ Yes~ I used...
This week my students will be constructing new shapes with pattern blocks. Here are some of the activities I plan to use.
Day 1: We will create an anchor chart to identify the pattern block shapes and their attributes. After we discuss the attributes~ my students will have free exploration time with the pattern blocks.
Day 2: Constructing new shapes: I will read aloud The Greedy Triangle by Marilyn Burns to introduce how shapes can change.
...Without a vision~ the people perish.
--proverb
I recall several years ago~ I asked renowned fifth-grade teacher~ Rafe Esquith~ for the secrets of success. He listed three actions that he took that made a big impact on his classroom.
One of those steps~ I remember him saying~ was developing a vision for what he wanted his students to become. Interestingly enough~ he said he looked at his most successful~ well-rounded students-those who excelled at academics~ sports~ musical...
On Thursday, Google introduced the Chromebook Pixel, the latest version of its Chromebook laptops, which store just about everything in cloud storage. The $1,300 Wi-Fi model includes a nearly 13-inch display touchscreen and begins shipping next week.
By combining tablet and laptop technology, heavyweight Intel chips and the most beautiful screen for your dollar, it’s designed for that juicy segment of the personal computer buyers known as “power users.”
The Pixel can...
Ever wonder what it's like to be a beekeeper~ especially one in charge of the White House bees? Charlie Brandts says the beehive near the First Lady's office averages about 175 pounds of honey each year. The honey is used for special events at the White House and is given as gifts to dignitaries visiting the White House. Perhaps~ your students might find this career posting on "Charlie Brandts~ Official White House Beekeeper" of interest. Check it out here:...
The Commission on Equity and Excellence had a Congressional mandate to provide advice to Secretary Duncan on the disparities in meaningful educational opportunities and to recommend ways in which federal policies can address such disparities. They just released a report titled For Each and Every Child, after a two year work period. The distinguished members of the panel, with diverse professional backgrounds and different...