Question

How does axial tilt affect climate?

Answer 1

Hint: The axial tilt is responsible for varying seasons on the earth all through the year. They cause the summer and winter seasons on opposite sides of the equator.

Complete answer:
For a habitable earth, the axial tilt of the earth's spin respective to the orbital plane around the sun is much needed. The axial tilt of around 23.5 degrees is responsible for the occurrence of moderate seasons thus avoiding extreme temperatures elsewhere on the planet.

The axial tilt is directly proportional to the temperature extremes. With the increase in axial tilt of earth, the seasons reach more extremity. When a particular hemisphere is tilted towards the sun, it tends to get more solar radiations which are responsible for the summer season. The other hemisphere which is tilted away from the sun receives the least amount of solar radiation and thus exhibits winter season.
Therefore, during various stages of the year different parts of the earth depicts different weathers depending upon the degree of the axial tilt. Moreover, the intensity of the season also varies depending upon the extent of the tilt. Hence, this also increases the seasonal contrast in hemispheres around the axial line of the equator.

Note: The axis of the earth is tilted roughly around 23.5 degrees, that is the rotation of earth on a daily basis is lifted through 23.5 degrees in accordance with its revolution around the sun on a yearly basis. However, the change in the axial tilt is not observed all-round the year but it occurs when the earth moves towards the other side of the sun.