Which has the highest density at room temperature?
AIron
BWood
CWater
DAir
Answer & Solution
Correct answer: A. Iron
1. Iron is a metal with closely packed atoms.
2. Its density is about 7800 kg per cubic metre.
3. Wood floats on water, so its density is less than 1000.
4. Air has the lowest density (about 1.2).
5. So iron has the highest density.
_Source: Selina Concise Physics ICSE Class 8, Ch 1 'Matter'_
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