The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from
A. Ionosphere
B. Troposphere
C. Mesosphere
D. Stratosphere
Everyday Science
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What prevents the earth’s atmosphere from drifting away into space?
A. Gravity
B. Ozone layer
C. Troposphere
D. Ecosystem
What prevents the earth’s atmosphere from drifting away into space? Read More »
What are rows in Periodic table called?
A. Period
B. Group
C. Verticals
D. Perpendiculars
What are rows in Periodic table called? Read More »
The time taken by Sun to revolve around the center of our galaxy is
A. 150 million years
B. 250 million years
C. 300 millon years
D. 350 millon years
The time taken by Sun to revolve around the center of our galaxy is Read More »
Humans can hear in the range of ______ to _______Hertz (Hz)?
A. 10 Hz to 10,000 Hz.
B. 20 Hz to 20,000 Hz.
C. 30 Hz to 30,000 Hz.
D. 40 Hz to 40,000 Hz.
Humans can hear in the range of ______ to _______Hertz (Hz)? Read More »
There is no connection of supernova explosion with_______
A. Cosmic rays
B. Pulsars
C. The formation of heavyelements
D. Quasars
There is no connection of supernova explosion with_______ Read More »
Which of the following Rays are more Penetrating?
A. Beta rays
B. Alpha rays
C. Gamma rays
D. X-rays
Which of the following Rays are more Penetrating? Read More »
Our Body in space___
A. Gains Weight
B. Loses Weight
C. No Change
D. Little Change
Our Body in space___ Read More »
Which is the Most abundant color in Earth?
A. Blue
B. Green
C. Brown
D. Black
Which is the Most abundant color in Earth? Read More »