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(2) How is the standard time of a place determined?
Answer: Standard time is the official local time of a particular region. It is determined by the distance of meridian of a place from the prime meridian. It is considered as the fixed time for the places at same meridian.
(3) Explain about outer core of earth
Answer: Earth's outer core is a fluid layer about 2,400 km (1,500 mi) thick and composed of mostly iron and nickel that lies above Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km (1,800 mi) beneath Earth's surface. ... Unlike the inner (or solid) core, the outer core is liquid.
B.
(1) Earth is protected by magnetosphere
Answer : The magnetosphere is the region of space surrounding Earth where the dominant magnetic field is the magnetic field of Earth. This magnetic field protects the earth's atmosphere from the harmful solar winds coming from the sun.
(2) Air become saturated
Answer : Air can become saturated due to evaporation, the mixing of two unsaturated air masses or by cooling the air. Water vapor in the atmosphere condenses when it becomes saturated and bumps into condensation nuclei. Nuclei are particles. Water vapor and liquid water can condense onto these nuclei.
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