World Geography
Mertz Glacier is located in which continent?

Africa
Asia
Antarctica
North America

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World Geography
Which among the following statements is/are correct about the Thermosphere?It lies upto an altitude of 80 km from the earth’s surface.It contains electrically charged particles known as ions.The temperature here starts increasing with heights.The International Space Station and other satellites orbit in this layer.Select the correct code from the options given below:

Only 3 & 4
Only 2, 3 & 4
1, 2, 3 & 4
Only 1, 3 & 4

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World Geography
The sidereal month may be defined as

the period in which the moon completes an orbit around the Earth and returns to the same position in the sky
None of these
the period in which the moon completes an orbit around the earth
the period of rotation of moon

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