Calcination Is

question 34

Multiple Choice

Calcination is

• A) heating an ore, in the presence of hydrogen or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds.
• B) heating an ore, in the presence of helium or another substance, in order to purify the ore and obtain the liquid metal.
• C) selectively dissolving a metal in solution to separate it from its ore.
• D) the process of heating an ore to drive off volatile compounds.
• E) forming metal parts using steam and large crystals of metal.

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Definitions:

Backcountry Farmers

Agriculturalists living in rural, often remote areas of the country, historically known for their self-reliance and small-scale farming.

Subsistence Agriculture

Subsistence Agriculture is a type of farming in which the farmers focus on growing enough food to feed themselves and their families, with little to no surplus for trade.

Agricultural Diversification

The practice of growing a variety of crops or engaging in different agricultural activities to reduce risk and increase sustainability in farming.

Crop-Lien System

A credit system widely used in the Southern United States after the Civil War, where farmers used their crops as collateral for loans, leading to cycles of debt and poverty.