How seasons occur - class-V

Christmas is celebrated in summer in Australia because Christmas is celebrated everywhere on 25 December, and that date — in most of Australia — is in the summertime. And, for Christians at least, Christmas is fundamentally about the birth of Christ — whenever that may have occurred — and not about winter.

False

• Sun rays falling vertically move between 23 and 1/2 degrees north and 23 and 1/2 degrees south latitudes throughout the year. On 22nd december, the sun rays fall vertically at the 23 1/2 degrees south.

The axis of the Earth is tilted at an angle of 23 1/2° from a perpendicular to the orbital plane.  This tilting of the axis is called the inclination of the Earth's axis. Due to this inclination, the axis of the Earth makes an angle of 66 1/2° with the plane of the Earth's orbit.

On 21 June sun rays fall vertically over the Tropic of Cancer. This position of the Earth is called Summer Solstice. On this day, It is considered the longest daylight time in Northern Hemisphere but in Southern Hemisphere, it is considered as the shortest daylight time.

The summer solstice in the northern hemisphere occurs when the Sun is directly overhead at noon on the Tropic of Cancer. The summer solstice happens on 21 June. This day has the longest daylight time.

• The winter solstice falls on 22nd December during which there is continuous daylight on the South pole and continuous darkness at the North pole. Hence option D is correct.
• During summer solstice i.e. 21st June, there is continuous daylight at the North pole.
• Equinox refers to an equal period of darkness and daylight.

After
22nd March, other parallels between the equator and the Tropic of
Cancer in the northern hemisphere start receiving perpendicular rays
sequentially. Only on 21st June and 22nd December the sunrays become
perpendicular on the Tropic of Cancer and Tropic of Capricorn
respectively.These two days are called Solstice days.

Sunrays
are never perpendicular to any of the parallels between Tropic of Cancer and the North Pole or between Tropic of Capricorn and the South Pole. 22nd December marks the longest day and the shortest night in the southern hemisphere.

The
movement of the sun towards the north or south in a year is called the
apparent movement of the sun. The revolution of the earth around the sun and the tilted axis of the earth are the two factors responsible for the apparent movement of the sun. Seasons occur only with reference to the northern and the southern hemispheres.

In
the northern hemisphere , 21st March is called spring or vernal equinox
whereas 23rd September is called autumnal equinox. The equinox or
solstice dates can vary by a day or so.