Questions

Dr Manmohan Singh also announced that the year 2012 would be celebrated as the National Mathematics Year. The Indian mathematical genius Srinivasa Ramanujan was born on 22 December 1887 and died on 26 April 1920.

The term for classifying and grouping organisms is Taxonomy. It is the science of defining and naming groups of biological organisms on the basis of shared characteristics.

When water is cooled from 4°C to 0°C, its density decreases.

When water cools from 4°C to 0°C, ice crystals begin to form because the water is approaching its freezing point. When water freezes, the water molecules form a lattice that increases the volume. As a result, the density decreases. This is why ice will float on top of water; ice has a lower density than the water.