GENERAL KNOWLEDGE

Ninety-six percent of salt water is pure water. There is 3 percent common salt in it. The remaining one percent is made up of more than 80 elements, including sulphate, magnesium, bromide, calcium, potassium, strontium, boron, fluoride and gold. Some seas have more salt than others.
The Pacific Ocean is three times bigger than Asia, the biggest continent on Earth. It covers nearly one-third of the Earth’s surface. Its widest part is about 1,770 km or 11,000 miles. That distance would take you halfway around the world.

Just one part oil per million parts water will make drinking water smell and taste funny. One gallon of petrol can contaminate 750,000 gallons of water.

If you could weigh all the water that falls on a single acre of land during one inch of rainfall, it would weigh 113 tons — that is 226,000 pounds. The amount of water on earth has remained the same since the planet was created some 4,500 million years ago.

Without clouds and other constituents of the earth’s atmosphere, the surface of our planet would reach a temperature of 176 degree centigrade at the equator by day and minus 220 degree centigrade by night!