Chemistry, a branch of physical science, is the study of the composition, structure, properties and change of matter. Chemistry is chiefly concerned with atoms and their interactions with other atoms - for example, the properties of the chemical bonds formed between atoms to create chemical... MORE
Chemistry, a branch of physical science, is the study of the composition, structure, properties and change of matter. Chemistry is chiefly concerned with atoms and their interactions with other atoms - for example, the properties of the chemical bonds formed between atoms to create chemical compounds. As well as this, interactions including atoms and other phenomena - electrons and various forms of energy—are considered, such as photochemical reactions, oxidation-reduction reactions, changes in phases of matter, and separation of mixtures. Finally, properties of matter such as alloys or polymers are considered. Chemistry is sometimes called "the central science" because it bridges other natural sciences like physics, geology and biology with each other. Chemistry is a branch of physical science but distinct from physics. The etymology of the word chemistry has been much disputed. The origin of chemistry can be traced to certain practices, known as alchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East. LESS
http://www.democracynow.org - Momentum is growing in the movement to divest from fossil fuel companies. On Thursday, South African Archbishop Desmond Tutu called for an anti-apartheid-style boycott and disinvestment campaign against the industry for its role in driving climate change. Meanwhile, nearly 100 members of the faculty at Harvard University released an open letter calling on the Ivy League school to sell off its interests in oil, gas and coal companies. "If the Corporation regards divestment as 'political,' then its continued investment is a similarly political act, one that finances present corporate activities and calculates profit from them," wrote the professors. "Slavery was once an investment issue, as were apartheid and the harm caused by smoking." Harvard has the largest university endowment in the country, worth more than $32 billion. We speak to James Anderson, professor of Chemistry and Earth and Planetary Sciences at Harvard University. He is one of the signatories to the letter urging Harvard to divest from the fossil fuel industry. He has done groundbreaking work exposing the link between climate change and ozone loss. We also speak to Jamie Henn, co-founder of the climate change-focused organization, 350.org. Democracy Now!, is an independent global news hour that airs weekdays on 1,200+ TV and radio stations Monday through Friday. Watch our livestream 8-9am ET at http://www.democracynow.org. Please consider supporting independent media by making a donation to Democracy Now! today, visit http://owl.li/ruJ5Q. FOLLOW DEMOCRACY NOW! ONLINE: Facebook: http://www.facebook.com/democracynow Twitter: @democracynow YouTube: http://www.youtube.com/democracynow SoundCloud: http://www.soundcloud.com/democracynow Daily Email: http://www.democracynow.org/subscribe Google+: https://plus.google.com/+DemocracyNow Instagram: http://instagram.com/democracynow Tumblr: http://democracynow.tumblr Pinterest: http://www.pinterest.com/democracynow
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