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What is work? Physics definitions

By |2018-05-31T11:49:15+00:00August 17th, 2017|Physics|

Ancient Egyptian cattle plowing (Louvre Museum, Paris) You might think you know what work is, like homework, or having to pick up your room, right? But to scientists, work has a more definite meaning: work is force x distance. That means that you can measure work by measuring how much force, or energy, [...]

What is sharecropping?

By |2017-08-10T23:21:14+00:00August 10th, 2017|Economy, North America|

Sharecroppers picking cotton. See the little girl and the bigger boy? (ca 1890) When people didn't own any land, or they lost their land because of not being able to pay back money or food they borrowed, they often became sharecroppers. This means that they would farm land that belonged to somebody else (usually a rich man, because [...]

Clay, sand, and loam – Soil types

By |2018-04-19T14:45:39+00:00June 20th, 2017|Economy, Geology|

Soil types triangle All dirt is basically made of three different kinds of particles. These are clay, sand, and loam. Clay is very fine, small inorganic particles, worn down from rock. Sand is bigger, coarser particles, also from rock, often quartz or silica. Loam is organic particles (bits of dead plants). Geologists and [...]

Organizing farm work – History of farming

By |2018-04-19T10:27:38+00:00June 12th, 2017|Economy|

Egyptian wall painting of farm work Family farms Maybe when people first started farming, each family pretty much farmed by itself. Mom and Dad and the kids planted the grain and the vegetables, and later they harvested them. And throughout antiquity and the middle ages, many farms were family farms that worked just like [...]

Who domesticated cattle? Central Asia

By |2018-04-18T23:54:16+00:00June 12th, 2017|Central Asia|

History of cows: Cows in a field The wild auroch Cattle are the tame version of the wild aurochs that used to live on the grass plains of Asia, Africa, and Europe. About 5000 BC, people in Central Asia began to keep tame cattle. At first people just kept cattle for their meat [...]