Question

Explain the anomalous expansion of water.

Answer 1

Solids, liquids and gases expands when heated and contracts when cooled.

Water however shows an anomalous (unusual) behaviour in that it contracts when it is temperature is raised from 0^oC to about 4^o c. When ice is heated from say -20^oC, it expands until its temperature reaches 0^oC and it melts with no change in temperature. The melting is accompanied by contraction. The water formed will still contract as its temperature rises from 0^oC

Above 4^oC, the water expands with increase in temperature. Since volume of a given mass of water is minimum at 4^oC, water at this temperature has a maximum density, slightly higher than 1g/cm³.

At the melting point of water (0^oC) there is a drastic increase in the volume, resulting in a large decrease in density as the ice forms. 

Answer 2

It's when the water expands when cooled and contract when heated

Answer 3

It is the unusual behaviour of water in that it contracts when heated and expands when cooled between 0-4 degrees Celsius 

Answer 4

Refers to the unusual behavior of water in which it contracts when heated and expands when cooled between 0 degrees and 4 degrees.

Answer 5

It refers to when water shows an unusual behavior in that it contracts when heated an expands when cooled

Answer 6

Refers to the the way water expands unnormarly 

Answer 7

For example if water gets into a rock it freezes and breaks the rock into small particles