Question

the variation in the length of days and nights is due to _______ of the earth's axis.

The earth's orbit around the sun is _______ in shape.​

Answer 1

Answer:

Earth rotates on its axis; this causes us to experience day and night. But Earth's axis is tilted 23.5 degrees (the angle is measured between Earth's equatorial plane and the plane in which it orbits our Sun).

Answer 2

Answer:

the variation in the length of days and nights is due to rotation of the earth's axis.

The earth's orbit around the sun is ellipse in shape.