Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

Inhabitants are unaware of the speed of rotation of the planet Earth because 1. the angular velocity is constant for each place on the Earth’s surface 2. the atmosphere rotates with the Earth 3. ther…

Normally, the temperature decreases with the increase in height from the Earth’s surface, because 1. The atmosphere can be heated upwards only from the Earth’s surface. 2. There is more moisture in t…

Given below are two statements, one labelled as Assertion (A) and the other as Reason (R): Assertion (A): The intensity of earthquake shaking is generally maximum at the epicentre. Reason (R): The ep…

Consider the following statements and select the correct answer from the codes given below: 1. The northern end of the earth’s axis is called North Pole. 2. 45° latitude is half of the length of the…

At which average speed the Earth revolves around the Sun?