10 Questions
What generalisations can be made about metals according to the text?
Metals are malleable, ductile, dense, and can conduct electricity well.
Why do most metals feel instantly cold to the touch?
Because they conduct heat well, carrying heat energy quickly away from the body.
What typically happens to metal objects that are repeatedly stressed and strained?
They suddenly fracture due to metal fatigue.
Why do metals tend to have a shiny and silvery grey color?
Because they tend to reflect all light wavelengths equally.
Which of the following is NOT a generalisation made about metals in the text?
Metals tend to be transparent to light.
What is the first step in producing large quantities of metals like iron, aluminium, or copper?
Extracting an ore from a mine or quarry
Why is extracting metals often difficult, dangerous, expensive, and polluting?
Mainly because metals are usually fused with oxygen and other compounds
What is the purpose of smelting iron ore?
To roast it in air to remove impurities
Which process involves separating a chemical solution into its constituent elements by passing an electric current through it?
Electrolysis
Why can't metals generally be found in the ground in their pure form?
Due to the presence of useless rock and oxides
Learn about the process of how metals are made, from extracting them from the ground to refining and purifying them for various uses like in airplanes and batteries.
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