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The Free High School Science Texts (FHSST) organization is a South African non-profit project, which creates open textbooks on scientific subjects. Textbooks are edited to follow the government's syllabus , and published under a Creative Commons license (CC BY [ 1 ] ), allowing teachers and students to print them or share them digitally.
5th century BC: The earliest documented mention of a spherical Earth comes from the Greeks in the 5th century BC. [31] It is known that the Indians modeled the Earth as spherical by 300 BC [32] 460 BC: Empedocles describes thermal expansion. [33] Late 5th century BC: Antiphon discovers the method of exhaustion, foreshadowing the concept of a limit.
The arrival of modern science, which grew out of the Scientific Revolution, in India and China and the greater Asian region in general can be traced to the scientific activities of Jesuit missionaries who were interested in studying the region's flora and fauna during the 16th to 17th century. [67]
The book's title is similar to a 1995 book title, The Sixth Extinction by Richard Leakey and Roger Lewin. Also included are excerpts from interviews with a forest ecologist , atmospheric scientist Ken Caldeira , wildlife and conservation experts, a modern-day geologist, and fungus researchers in New England and New York State .
10 −5 s ~ 1 s: 10 12 K ~ 10 10 K (150 MeV ~ 1 MeV) Quarks are bound into hadrons. A slight matter-antimatter asymmetry from the earlier phases (baryon asymmetry) results in an elimination of anti-baryons. Until 0.1 s, muons and pions are in thermal equilibrium, and outnumber baryons by about 10:1. Close to the end of this epoch, only light ...
Object Lessons is "an essay and book series about the hidden lives of ordinary things". Each of the essays (2,000 words) and the books (25,000 words) investigate a single object through a variety of approaches that often reveal something unexpected about that object.
This page was last edited on 13 January 2020, at 00:42 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The concept pre-dates Havighurst's book, as does the use of the phrase, [2] but he is credited with popularizing it. [ 3 ] The phrase sometimes denotes not a developmental stage, but rather "that moment when a unique, high interest situation arises that lends itself to discussion of a particular topic."
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