What is a spectrograph?

It is an instrument for producing and photographing a spectrum. Used to measure properties of light over a specific portion of the electromagnetic spectrum.

How is paper made?

Most (though not all) paper is made from wood. Logs are stripped of bark, chopped into very small pieces and then pulped. The pulping stage is important, for at that time various chemicals and things like clay, or old rags, or even straw, are added, which determine the quality, colour and smoothness (or roughness) of the finished paper. Once pulped, the paper is rolled into sheets which are dried out before being cut to required shapes and sizes.

What is a boutique?

From the French for shop, the word is now used to indicate a particular kind of small store that specializes in ready-made fashion clothes, and perhaps crafts, scents and soaps.

What is an altimeter?

It is a dialled meter for showing how high an aircraft or spacecraft is above ground. Most altimeters work using air pressure. The measurement of altitude is called altimetry

What is a telemeter?

It is a piece, or pieces, of apparatus for measuring physical changes from a distance. It has wide application in space technology.

Which is the largest planet in our Solar System?

Jupiter is the fifth planet from the Sun and the largest planet within the solar system. It is two and a half times as massive as all of the other planets in our solar system combined.It is about ten times the diameter of the earth, and rotates on its axis in about ten hours, which is faster than Earth.

Who discovered the Mississippi river?

Fernando de Soto (1496-1542), a Spanish explorer who, while governor of Cuba in the late 1530s, took an expedition from the island to the mainland of Florida. He found the Mississippi but died of fever before he could reach Mexico.