Oil

Tea

Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of Camellia sinensis, an evergreen shrub native to China, India and other East Asian countries. Tea is also rarely made from the leaves of Camellia taliensis. After water, it is the most widely consumed drink in the world. …

Tea Read More »

Minnesota

Minnesota is a state in the upper Midwestern United States. It is the 12th largest U.S. state in area and the 22nd most populous, with over 5.7 million residents. Country United States Admitted to the Union May 11, 1858 (32nd) Capital Saint Paul Largest city Minneapolis Largest metro and urban areas Minneapolis–Saint Paul  Governor Tim Walz   Lieutenant Governor …

Minnesota Read More »

Stream and River Deposits

As you possibly already know, the Earth’s surface is constantly eroded by flowing water. After rivers erode rock and soil, they deposit (drop) their load downstream. This process is known as deposition. Rocks and soils deposited by streams are known as “sediments”. Rivers and streams deposit sediment where the speed of the water current decreases. In …

Stream and River Deposits Read More »

Bagnacavallo Madonna

The Bagnacavallo Madonna is an oil painting by Albrecht Dürer, dating to before 1505. It is now in the Magnani-Rocca Foundation of Traversetolo, in the province of Parma, Italy.

Agriculture

Agriculture is the cultivation of plants and livestock. Agriculture was an important step in the growth of sedentary human civilization, since it produced food surpluses that allowed people to live in cities. Agriculture has been practiced for thousands of years. Beginning at least 105,000 years ago, fledgling farmers began to sow wild grains approximately 11,500 …

Agriculture Read More »

Kerosene

Kerosene, paraffin, or lamp oil is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Its name derives from Greek: κηρός (keros) meaning “wax”, and was registered as a trademark by Canadian geologist and inventor Abraham Gesner in 1854 before evolving into a generic trademark. It is sometimes spelled kerosine in scientific and industrial usage. The term kerosene is common in much …

Kerosene Read More »

Paraffin wax

Paraffin wax (or petroleum wax) is a soft colorless solid derived from petroleum, coal or oil shale that consists of a mixture of hydrocarbon molecules containing between twenty and forty carbon atoms. It is solid at room temperature and begins to melt above approximately 37 °C (99 °F), and its boiling point is above 370 °C (698 °F). Common applications for paraffin wax include lubrication, electrical insulation, and candles; dyed paraffin wax can be made …

Paraffin wax Read More »

Land

Land is the solid surface of Earth that is not permanently submerged in water. Most but not all land is situated at elevations above sea level (variable over geologic time frames) and consists mainly of crustal components such as rock, sand, soil, and sometimes ice. The vast majority of human activity throughout history has occurred in land areas that support agriculture, habitat, and various natural resources. Some life forms, including terrestrial plants and terrestrial animals, …

Land Read More »

Boiler

A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation.