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Answer 1

Answer:

1. An axis is an invisible line around which an object rotates, or spins. The points where an axis intersects with an object's surface are the object's North and South Poles. In this illustration, Earth's axis is represented by the red line.
2. As we know that the earth has two types of motions, namely rotation and revolution. Rotation is the movement of the earth on its axis. The movement of the earth around the sun in a fixed path or orbit is called Revolution.
3. Two characteristics of rotation are the complete rotation of the earth from west to east in 24 hours and along its tilted axis which is always in the same direction towards the Pole Star.
4. Effects of Earth's revolution include the seasons and variation in the length of days and nights. In addition to revolution, the tilt of Earth's axis relative to its plane of orbit has a profound effect on Earth. At almost any given time, one hemisphere is tilted toward the sun, as the other is tilted away.
5. Seasons are also caused due to the inclination of the earth. If the axis of the earth would have been vertical, then all places and the earth would have experienced only one season throughout the year.
6. Earth moves very fast. It spins (rotates) at a speed of about 1,000 miles (1600 kilometers) per hour and orbits around the Sun at a speed of about 67,000 miles (107,000 kilometers) per hour. We do not feel any of this motion because these speeds are constant.
7. The definition of a revolution is the movement of one object around a center or another object, a forceful overthrow of a government by the people or any sudden or grand change. An example of revolution is movement of the earth around the sun.
8. The earth revolves at an average speed of 100,000 km per hour. The earth revolves in an elliptical orbit with two particular positions i.e. perihelion 147.3 million km away from sun in January and aphelion 152 million km away from sun in July.
9. Two main effects of revolution are the seasonal changes throughout the year and the creation of particular heat zones on temperature zones.