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Chlorastrolite, also known as Isle Royale Greenstone, is a green or bluish green stone. [1] Chlorastrolite has finely radiating or stellate (for examples, see crystal habits) masses that have a "turtleback" pattern. The stellate masses tend to be chatoyant, meaning they have a varying luster. This chatoyancy can be subtranslucent to opaque.
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
The experiments were performed between 1906 and 1913 by Hans Geiger and Ernest Marsden under the direction of Ernest Rutherford at the Physical Laboratories of the University of Manchester. The physical phenomenon was explained by Rutherford in a classic 1911 paper [ 1 ] that eventually led to the widespread use of scattering in particle ...
A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.
The drive to name coal as an official state symbol was initiated by a high school student from Wharncliffe, West Virginia, who initiated her project at a school fair and collected 2,500 signatures on a petition that was submitted to legislators. [85]
“In this series, Yan's investigations, in which metaphoric and physical worlds quietly interpenetrate each other, delve into the meaning of spirituality and metamorphoses, as well as raising other questions about being and becoming through the lens of art and nature, art and science, art and culture and their interconnections.
Its executive director, Shawn Carlson, Ph.D., was a physicist and established science writer who had left academe a year earlier to devote his career to advancing amateur science. Dr. Carlson took over the column in November of that year and immediately returned its focus to cutting-edge science projects that amateurs can do inexpensively at home.
Later experiments revealed that the temperature inside the bubble during SBSL could reach up to 12,000 kelvins (11,700 °C; 21,100 °F). The exact mechanism behind sonoluminescence remains unknown, with various hypotheses including hotspot, bremsstrahlung , and collision-induced radiation.