That the earth is rotating on its axis is established by the fact that

 (a) The moon and stars move in the sky

(b) The earth experiences day and night

(c) The planetary winds are blowing

(d) The time in different parts of the earth is not the same

Answer: B

Most of the weather phenomena take place in which of the following layers of the atmosphere

 (a) Stratosphere

(b) Mesosphere

(c) lonosphere

(d) Troposphere

Answer: D

Name the instrument used for measuring humidity

 Name the instrument used for measuring humidity

(a) Barometer

(b) Hygrometer

(c) Thermometer

(d) Hydrometer

Answer: (B) Hygrometer

Upto about 50 km from the surface of earth the atmosphere consists of approximately

 (a) 78% oxygen and 21% nitrogen

(b) 21% oxygen and 78% nitrogen

(c) 68% oxygen and 32% nitrogen

(d) 33% oxygen and 66% oxygen

The local time at a place is 6 a.m. when the GMT is 3 am the longitude of that place is

 (a) 45 degrees east

(b) 45 degrees west

(c) 120 degrees east

(d) 120 degrees west

One-hour difference in local time between two places is equivalent to a difference of ______.

 (a) 10° longitude

(b) 15° longitude

(c) 15° latitude

(d) 20° latitude