Numerical answer
Arrange sentences 1, 2, 3 and 4 into a coherent paragraph. Enter the correct order as a four-digit number (e.g., 3142).
1. This is because glass, technically an amorphous solid, lacks the rigid atomic lattice of a true crystal, allowing it to be reshaped by heat far more easily than metals with fixed crystalline structures.
2. Ancient glassmakers understood none of this atomic theory, yet through centuries of trial and error they developed techniques for blowing, molding and coloring glass that remain recognizable in workshops today.
3. One property that made glass so attractive to early artisans was its unusual behavior when heated: rather than melting sharply at a fixed point like most solids, it softens gradually across a range of temperatures.
4. Glass has been prized by artisans since antiquity for its unique combination of transparency, malleability when heated, and durability once cooled.
1. This is because glass, technically an amorphous solid, lacks the rigid atomic lattice of a true crystal, allowing it to be reshaped by heat far more easily than metals with fixed crystalline structures.
2. Ancient glassmakers understood none of this atomic theory, yet through centuries of trial and error they developed techniques for blowing, molding and coloring glass that remain recognizable in workshops today.
3. One property that made glass so attractive to early artisans was its unusual behavior when heated: rather than melting sharply at a fixed point like most solids, it softens gradually across a range of temperatures.
4. Glass has been prized by artisans since antiquity for its unique combination of transparency, malleability when heated, and durability once cooled.
Show answer and solution
Answer: 4321
Sentence 4 is the clear opener, introducing glass's general appeal (transparency, malleability, durability) as a topic sentence. Sentence 3 narrows in on one specific property mentioned in 4 — its unusual heating behavior. Sentence 1 explains WHY glass behaves this way ('This is because...'), directly following from 3. Sentence 2 then pivots to how ancient artisans exploited this property despite lacking the underlying science, providing a natural close. Order: 4-3-1-2.
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