World Geography Notes| Free PDF Download

Questions on World Geography are commonly asked in different SSC, Railway & other government exams. It is one of the most important sections of Geography. Get complete study notes on world geography in this blog.

World Geography-Universe

1. The Universe includes planets, stars, galaxies, the contents of intergalactic space, the smallest subatomic particles, and all matter and energy.
2. The estimated age of the universe is about 13.82 billion years. The study of the universe is known as Cosmology.
3. The Big Bang Theory is the most accepted explanation of the origin of the universe. As per this theory, all matter was condensed into one point. Later this point exploded and started expanding and thus we have the present universe.

World Geography- Latitudes and Longitudes:-

They are imaginary lines drawn on the surface of the earth. And these lines make it easier to locate any place on the surface of the earth.

Equator: Imaginary line which divides the earth into two equal halves, northern and southern hemispheres. The Equator is the reference latitude and hence it is the Zero degree latitude.

Parallels of latitudes: These are parallel circles drawn from the equator up to poles. Parallels divide the earth into various heat zones. The different zones have different types of climate and vegetation.

Meridians of Longitudes: These are the imaginary lines, drawn from pole (North Pole) to pole (South Pole). Naturally, there is no reference longitude, hence we have fixed a longitude passing via the Royal Observatory, Greenwich, in London. And this reference longitude is also called Greenwich meridian or Prime meridian. Prime meridian divides the earth into the eastern and western hemispheres.

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