Question

what is meant by the term aurora borealis?where do they occur

Answer 1

The Aurora borealis is an incredible light show which caused by collisions between electrically charged particles released from the sun, that enter the earth’s atmosphere and collide with gases such as oxygen and nitrogen present in the atmosphere. These lights are seen around the magnetic poles of the northern and southern hemispheres.

Auroras that occur in the northern hemisphere are called ‘Aurora Borealis’ or ‘northern lights’ and auroras that occur in the southern hemisphere are called ‘Aurora Australis’ or ‘southern lights’.

Both these Aurora’s can be seen in the northern or southern hemisphere, in an irregularly shaped like oval centered over each magnetic pole. Aurora displays can appear in many different colours, although green is the most common, but in addition to this, colours such as red, yellow, green, blue and violet are also seen occasionally. The auroras can appear in many forms, from small patches of light that appear out of nowhere to streamers, arcs, rippling curtains or shooting rays that light up the sky with an incredible glow.

Answer 2

Exosphere....................................