GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Bright Lights above the earth’s poles are called auroras.
A
true
B
false
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Auroras are visible almost every night near the Arctic and Antarctic Circles, which are about 66.5 degrees north and south of the Equator. In the north, the display is called aurora borealis, or northern lights. In the south, it is called aurora australis, or southern lights.

Detailed explanation-2: -The aurora can be seen near the poles of both the northern and southern hemisphere. In the north the display is known as the aurora borealis; in the south it is called the aurora australis. These ‘northern’ and ‘southern lights’ have fascinated, frightened and inspired humans for centuries.

Detailed explanation-3: -Auroras occur when charged particles (electrons and protons) collide with gases in Earth’s upper atmosphere. Those collisions produce tiny flashes that fill the sky with colourful light. As billions of flashes occur in sequence, the auroras appear to move or “ dance “ in the sky.

Detailed explanation-4: -In the early 17th century, the astronomer and scientist Galileo Galilei named this phenomenon Aurora Borealis. Aurora was the Roman goddess of dawn, and Boreas was the Greek name for the north wind. Galilei thought that an aurora was caused by the sunlight reflected from the atmosphere.

Detailed explanation-5: -Of the two poles, the aurora can be seen the strongest near the arctic circle in the Northern Hemisphere. The reason that the Aurora can only be seen at the poles has to do with how the Earth’s magnetic field acts. The Earth has a metal core and acts much like a bar magnet with two poles and a magnetic field.

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