World Geography
The process that creates the deep oceanic trenches is called

plate tectonics
isostasy
continental drift
sea floor spreading

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

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