World Geography
Which among the following statements is/are correct about Dust particles in the Earth’s atmosphere?Higher concentration of dust particles is found in equatorial and polar regionsThey are generally found in the lower layers of the atmosphereSelect the correct code from the options given below:

Neither 1 & 2
Both 1 & 2
Only 1
Only 2

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World Geography
The periodic rise and fall of the sea level on the earth, gives rise to tides. This is related to

ultraviolet rays from the sun
infrared rays from the sun
None of these
the position of the moon with reference to the earth and the gravitational pull exerted mainly by the moon and partly by the sun

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