Materials (PLTW- Principles of Engineering)
Questions and Answers 100% Correct | Latest
Update 2025
Materials - ANSWER The tangible substances that make up physical objects.
Elements - ANSWER A substance that is composed of only one type of atom
and cannot be broken down by chemical means into a simpler form. .
Metal - ANSWER A solid material that is typically hard at room temperature, is
shiny, and possesses good thermal and electrical conductivity.
Smelt - ANSWER To extract a metal element from an ore by applying high,
sustained heat in the presence of a fluxing material such as limestone.
Ore - ANSWER A raw material that contains a desired metal element in a
compounded state with other elements in sufficient quantities that warrant
commercial extraction through mining, smelting, or other processes.
Coke - ANSWER A low-sulfur bituminous coal that has been baked to remove
water, coal-gas, and coal-tar, leaving mostly carbon. Used in the production of
steel.
Atoms - ANSWER The smallest indivisible unit of matter and the most basic
building block of an element that still retains the properties of that element.
, Slag - ANSWER Undesirable and unwanted impurities that result from a
smelting process.
Alloy - ANSWER A mixture of two or more elements, with one element being a
metal.
Precious Metals - ANSWER Relatively scarce, highly corrosion-resistant metals
that are valued for their color, luster, and malleability. Gold, silver, & platinum are
examples.
Malleable - ANSWER Capable of being shaped or formed without breaking by
means of hammering or some other application of pressure.
Work-Hardens - ANSWER To repeatedly apply pressure to a metal so that it
permanently deforms and becomes stronger & harder.
Ductility - ANSWER 1) A mechanical property that describes a material's ability
to experience plastic deformation through tension without breaking.
2) A physical property that allows a material to be drawn out into a long, thin wire
without breaking.
Conductivity - ANSWER A material's ability to transmit heat or electricity.
Inert - ANSWER Condition of having limited ability to react chemically with
other elements.
Questions and Answers 100% Correct | Latest
Update 2025
Materials - ANSWER The tangible substances that make up physical objects.
Elements - ANSWER A substance that is composed of only one type of atom
and cannot be broken down by chemical means into a simpler form. .
Metal - ANSWER A solid material that is typically hard at room temperature, is
shiny, and possesses good thermal and electrical conductivity.
Smelt - ANSWER To extract a metal element from an ore by applying high,
sustained heat in the presence of a fluxing material such as limestone.
Ore - ANSWER A raw material that contains a desired metal element in a
compounded state with other elements in sufficient quantities that warrant
commercial extraction through mining, smelting, or other processes.
Coke - ANSWER A low-sulfur bituminous coal that has been baked to remove
water, coal-gas, and coal-tar, leaving mostly carbon. Used in the production of
steel.
Atoms - ANSWER The smallest indivisible unit of matter and the most basic
building block of an element that still retains the properties of that element.
, Slag - ANSWER Undesirable and unwanted impurities that result from a
smelting process.
Alloy - ANSWER A mixture of two or more elements, with one element being a
metal.
Precious Metals - ANSWER Relatively scarce, highly corrosion-resistant metals
that are valued for their color, luster, and malleability. Gold, silver, & platinum are
examples.
Malleable - ANSWER Capable of being shaped or formed without breaking by
means of hammering or some other application of pressure.
Work-Hardens - ANSWER To repeatedly apply pressure to a metal so that it
permanently deforms and becomes stronger & harder.
Ductility - ANSWER 1) A mechanical property that describes a material's ability
to experience plastic deformation through tension without breaking.
2) A physical property that allows a material to be drawn out into a long, thin wire
without breaking.
Conductivity - ANSWER A material's ability to transmit heat or electricity.
Inert - ANSWER Condition of having limited ability to react chemically with
other elements.
