Page 11 - Demo

11Let us read some interesting facts about our surroundings.A rainbow is actually a full circle of seven colours. But since we watch it from the ground, it appears as an arc or semi-circle.Pure water is also known as purified water. The most common form of pure water is distilled water. It has no colour, no taste and no smell.The earth%u2019s atmosphere is made up of many different gases, commonly known as air. It also contains dust particles, plant grains and other solid particles.70 per cent of the earth%u2019s surface is covered with water. Based on this observation, the earth acquired the nickname, the %u2018Blue Planet%u2019.