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."
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Children are certainly not seeing the world demonstrating the concept of peace. Is there really anything we can do to foster the concept when our news continually shows just the opposite?
The International Day of Peace is held every year on September 21st. Also called Peace Day, the first celebration was adopted by the United Nations in 1982. In 2001, nations of the world established September 21st as International Day of Peace. In 2016, the theme for the...
A new eight-story museum on the National Mall opens on September 24th and it was 100 years in the making. Called the National Museum of African American History and Culture, the museum was first discussed back in 1915, when African American Civil War veterans called for a museum to highlight the accomplishments of African Americans.
Congress established such a museum, to be part of the Smithsonian Institution, in 2003. Groundbreaking for the National Museum...
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National Hispanic Heritage Month is celebrated each year from September 15th–October 15th. It was originally established, in 1968, as Hispanic Heritage Week, by President Lyndon Johnson. In 1988, it became a month-long celebration. Some people question the need for an Hispanic Heritage Month, Black History Month, Women’s History Month, Native American Heritage Month, and other such months that recognize the achievements of groups which have helped to make this nation great. I believe we do...
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The changes in immigration are dramatically impacting our global communities and our classrooms, which are becoming more diverse and multicultural.
Our Global Teacher Bloggers are pioneers and innovators in fields such as technology integration, mathematics coaching, special needs education, science...
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Employers complain that graduates are not ready for work. Students...
With the new year about to begin, I’d like to share my A–Z Teaching List. If you have suggestions, please share.
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The 2030 Agenda for Sustainable Development calls on countries to begin efforts to achieve the 17 SDGs over the next 15 years. The goals address the needs of people in both developed and developing countries, emphasizing that no one should be left behind.
The changes in immigration...
National Aviation Day was established by President Franklin D. Roosevelt in 1939, on the birthday of...