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ICSE Class 7 Answered

1) Explain : Equal volumes of two substances can have different masses and vice versa. 2) Why is water denser than ice?
Asked by dibroy12 | 17 Jun, 2018, 09:13: AM
answered-by-expert Expert Answer
Mass = Volume×density
 
If two objects have equal volume, then mass of the objects is proportional to the respective density.
For example, if we take equal volumes of wood and iron, wood is having less density than iron. Hence iron have more mass thsn wood.
 
When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding. Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.
Answered by Thiyagarajan K | 17 Jun, 2018, 03:34: PM

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