Question Q6Explain and discussGS1GS1
What are Northern and Southern lights? Explain the phenomenon and discuss their associated impacts on Earth's atmosphere and human activities.
Introduction
Aurora Borealis and Aurora Australis are called as the Northern and Southern lights respectively, visible over the 66½° NLS line.
20 words
Main Body
Phenomena
1The space weather is influenced by coronal mass ejections and geo-magnetic storms.
2The earth's magnetosphere (part of the ionosphere) consists of several charged particles, called as the van Allen belts.
3When the CME particles interact with earth's magnetosphere, the molecular N₂ and O₂ particles get excited forming [illegible]
daring lights called as the Northern and Southern lights.
Impact
(A) Atmosphere
1Ionization of van Allen belts → cornus close to Earth.
2Ionization of the charged particles → illumination of the NoCH lights.
3Generation of heat in thermosphere.
(B) Human activities
1Harm to satellite, navigation, aeronautics, flights etc.
2Major source of tourism for the scandinavian countries.
IET: Islands (+7) of UDP → Aurora towers.
Thus, these natural sights are geo-atmospheric marvel, with both costs and benefits to society
— Ritika Chitlangia · AIR 55
135 words2 paragraphs
Conclusion
Thus, these natural sights are geo-atmospheric marvel, with both costs and benefits to society
14 words
Diagram
A circular diagram showing the Sun on the left with arrow pointing to Earth on the right, illustrating the solar wind and auroral lights interaction at the magnetic poles.
- Accurate definition of aurora phenomena
- Correct reference to 66½° latitude
- Identifies coronal mass ejections and geo-magnetic storms
- Mentions magnetosphere and van Allen belts correctly
- Includes relevant diagram
- Scientific approach with molecular explanations
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Topper
Ritika Chitlangia
AIR 55
Subject & Paper
GS1GS1
Topic
World Physical Geography
Geophysical Phenomena
Aurora - Northern and Southern Lights
Writing Stats
169
Total words
2
Paragraphs
scientific, technical
Tone