Podcast
Questions and Answers
What generalisations can be made about metals according to the text?
What generalisations can be made about metals according to the text?
- Metals are transparent, brittle, have high electrical resistance, and are dull in appearance.
- Metals are malleable, ductile, dense, and can conduct electricity well. (correct)
- Metals are gaseous, opaque, have high heat resistance, and feel warm to the touch.
- Metals are mostly liquid, disorganized, weak, and light.
Why do most metals feel instantly cold to the touch?
Why do most metals feel instantly cold to the touch?
- Because they do not conduct electricity well.
- Because they have high heat resistance.
- Because they conduct heat well, carrying heat energy quickly away from the body. (correct)
- Because they reflect all light wavelengths equally.
What typically happens to metal objects that are repeatedly stressed and strained?
What typically happens to metal objects that are repeatedly stressed and strained?
- They lose their density and conductivity.
- They suddenly fracture due to metal fatigue. (correct)
- They become stronger and more malleable.
- They become more brittle and transparent.
Why do metals tend to have a shiny and silvery grey color?
Why do metals tend to have a shiny and silvery grey color?
Which of the following is NOT a generalisation made about metals in the text?
Which of the following is NOT a generalisation made about metals in the text?
What is the first step in producing large quantities of metals like iron, aluminium, or copper?
What is the first step in producing large quantities of metals like iron, aluminium, or copper?
Why is extracting metals often difficult, dangerous, expensive, and polluting?
Why is extracting metals often difficult, dangerous, expensive, and polluting?
What is the purpose of smelting iron ore?
What is the purpose of smelting iron ore?
Which process involves separating a chemical solution into its constituent elements by passing an electric current through it?
Which process involves separating a chemical solution into its constituent elements by passing an electric current through it?
Why can't metals generally be found in the ground in their pure form?
Why can't metals generally be found in the ground in their pure form?
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