Question

earth movements and seasons question and answers

Answer 1

Question: How are season caused?

Answer: Seasons are caused due to the revolution of the earth and the tilt of the earth’s axis.

Question: Which are the four main seasons?

Answer: The four main seasons are:

SummerSpringWinterAutumnQuestion: What are the spring and autumn equinoxes?

Answer: On 21st March and 23 September the sun is directly overhead the equator and the earth experiences spring equinox and autumn equinox on these two days respectively.

Question: Explain the position of earth during summer solstice.

Answer: On 21st June when the sun is shining directly overhead the Tropic of Cancer and the northern hemisphere is tilted towards the sun it experiences summer solstice. The number of hours of daylight goes on increasing. There is six months of continuous daylight in Arctic Circle. All the places in the northern hemisphere have their longest day on this date.

Answer 2

he Earth is not static, it moves through the space following two movements: rotation and revolution.

ROTATION

Like a spinning top, the Earth is always rotating around its axis. The axis is an imaginary line that crosses through the center of the Earth connecting the North and the South Poles.

The Earth completes one rotation every 24 hours (1 day). The rotation of the Earth causes day and night.

The Earth rotates anticlockwise: the Sun rises in the East and it sets in the West.

THE EARTH'S AXIS IS AN IMAGINARY LINE



REVOLUTION

But the Earth not only rotates on its axis it also revolves around the Sun.

A complete orbit around the Sun occurs every 365 days (1 year).

THE EARTH REVOLVES AROUND THE SUN

THE SEASONS

The seasons are caused because the Earth's rotation axis is not straight, it is tilted (23.5 degrees). That means that part of the Earth leans towards the Sun, and another part of the Earth leans away from the Sun.

That is why different parts of the Earth receive different amounts of sunlight and heat: the part that leans towards the Sun will receive more sunlight and heat; while the part that leans away from the Sun will recive less sunlight and heat.

THE NORTHERN HEMISPHERE LEANS TOWARDS THE SUN (SO IT GETS MORE LIGHT AND HEAT), AND THE SOUTHERN HEMISPHERE LEANS AWAY FROM THE SUN (SO IT GETS LESS LIGHT AND HEAT).

THE NORTHERN HEMISPHERE LEANS AWAY FROM THE SUN (SO IT GETS LESS LIGHT AND HEAT) AND THE SOUTHERN HEMISPHERE LEANS TOWARDS THE SUN (SO IT GETS MORE LIGHT AND HEAT).

So, when the Northern hemisphere leans towards the Sun, the Southern hemisphere will lean away from the Sun: in the Northern hemisphere it will be summer (it will receive more sunlight and heat), and in the Sourthern hemisphere it will be winter (it will receive less sunlight and heat).

And when the the Southern hemisphere leans towards the Sun, the Northern hemisphere will lean away from the Sun: in the Southern hemisphere it will be summer, and in the Northern hemisphere it will be winter.

Autumn and spring are transit seasons: the Earth's axis doesn't tilt towards or away from the Sun. In autumn and spring the Earth's axis is tilted to one side, that is why most parts of the Earth receive the same amount of sunlight and heat.