Answer:

1. Earth completes one rotation on its axis in 24 hours. If Earth has completed two revolutions around the sun, it has completed two years. One year is approximately 365 days, so two years is approximately 730 days. Since Earth completes one rotation in 24 hours, it would have completed approximately 730 rotations in two years.

2. Revolution is longer for the Earth to travel around the sun than rotation. Rotation is the circular motion of an object around its own axis, while revolution is the circular motion of an object around another object. The time taken by the rotation of the earth is 24 hours. The time taken by the earth for one revolution is approximately 365 days.

3. Earth's movement around the sun has several effects. One of them is that it causes seasons to occur due to the tilt of the Earth's axis and its revolution around the sun. Another effect is that it creates perihelion and aphelion. Perihelion occurs when the Earth is closest to the Sun and aphelion occurs when the Earth is far from the Sun.

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