what is meant by Revolution of the earth ? state one effect of it
Answers
Answer:
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.
Answer:
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.
Explanation:
CHARACTERISTICS OF ROTATION - SHORTCUT
concept
i) The earth completes one rotation from west to east on its axis in 23 hours, 56 minutes, 4.09 seconds.
ii) The earth is always tilted in the same direction as it moves round the sun.
iii) The speed of the movement at the Equator is 1660 km per hour. The speed decreases towards the poles.
INCLINATION OF EARTH'S AXIS AND ITS SIGNIFICANCE - SHORTCUT
The angle of inclination of the Earth relative to the plane of the Earth's solar orbit is 23.5 degrees. This angle of inclination, also referred to as the "tilt" or "deviation," directly influences seasonal variations on the planet. The different seasons are due to the rotational tilt of Earth's axis. Places that are tilted towards the sun experiences the summer season, while those that are tilted away from the sun experiences the winter season.
CHARACTERISTICS OF REVOLUTION - SHORTCUT
concept
i) The earth moves round the sun at an average speed of 29.8 km per second.
ii) The gravitational pull makes the earth move faster when the earth is closer to the sun. Thus, the speed of revolution is not uniform.
iii) The period taken by the earth to make one complete round of the sun is 365 days, 5 hours, 48 minutes and 45.51 seconds which is taken as 365 days and 6 hours.
iv) The earth's axis is always inclined to its orbital plane at an angle of 66 and a half degree Celsius.
SOLSTICE - SHORTCUT
SUMMER SOLSTICE: The first day of the Season of Summer. On this day (JUNE 21 in the northern hemisphere), the Sun is farthest north and the length of time between Sunrise and Sunset is the longest of the year.
WINTER SOLSTICE: The first day of the Season of Winter. On this day (DECEMBER 22 in the northern hemisphere) the Sun is farthest south and the length of time between Sunrise and Sunset is the shortest of the year.
In the southern hemisphere, winter and summer solstices are exchanged. Summer: December 22. Winter: June 21.
EQUINOXES - SHORTCUT
On two days in a year, the sun shines vertically over the Equator i.e., at an angle of 90 o. These days are 21st March (Spring Equinox) and 23rd September (Autumn Equinox). At the Equinoxes, the days and nights are of equal length throughout the world. On March 21, it is spring in the northern hemisphere and on September 23, it is autumn. The position is reversed in the southern hemisphere