Correct Answer : Gold
Gold, which is not only the most valuable of metals, but also is without its peer in freedom from alloy, is known as the king of metals. Luxurious, classy and beautiful, gold is the most classic and coveted jewelry metal of all. It is also the oldest precious metal known to man.
Correct Answer : ionosphere
Extending from about 80 to 300 km (about 50 to 185 miles) in altitude, the ionosphere is an electrically conducting region capable of reflecting radio signals back to Earth.
Correct Answer : Carbon-dioxide
Global warming occurs when carbon dioxide (CO₂) and other air pollutants collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth's surface.
Correct Answer : 7
The pH of pure water (H20) is 7 at 25oC, but when exposed to the carbon dioxide in the atmosphere this equilibrium results in a pH of approximately 5.2.
Correct Answer : Neurons
In the form of electrical impulses, constantly travel back and forth between the brain and other parts of the body. A special cell called a neuron is responsible for carrying these messages. There are about 100 billion neurons in the human brain.
Correct Answer : Seismograph
Correct Answer : Jupiter
Correct Answer : Nitrogen
Correct Answer : Michael Faraday
The Father of Electricity, Michael Faraday was born on September 22, in 1791. The English scientist, who is responsible for the discovery of electromagnetic induction, electrolysis and diamagnetism, hailed from a poor family of a blacksmith.
Correct Answer : 1687
The three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687.
