Earth's Movement, Study notes of Astronomy

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The Earth moves in two different ways in space. The Earth rotates and revolves.

Earth’s Movement

Revolution (orbit) 365.25 days Rotation (spin) 24 hours

Earth’s Rotation

It takes the Earth 24 hours, or 1 day, to complete one rotation on its axis. When the side of the Earth that is facing the Sun is experiencing daytime , the side of the Earth that is facing away from the Sun is experiencing night-time.

The Sun

The Sun rotates on its axis. The Earth’s rotation makes the Sun appear to move across the sky, but the Earth is actually rotating. The Sun rises in the east. The Sun sets in the west.

Seasons in the Northern Hemisphere

The seasons are created through the combination of the Earth’s revolution and the tilt of the axis. Autumn Spring Spring Autumn Winter Summer Summer Winter When the northern hemisphere of the Earth is tilted away from the Sun, people in the these regions are experiencing winter. When the northern hemisphere of the Earth is tilted toward the Sun, people in these regions are experiencing summer.

Seasons in the Southern Hemisphere

The seasons are created through the combination of the Earth’s revolution and the tilt of the axis. Autumn Spring Spring Autumn Winter Summer Summer Winter When the southern hemisphere of the Earth is tilted away from the Sun, people in the these regions are experiencing winter. When the souther hemisphere of the Earth is tilted toward the Sun, people in these regions are experiencing summer.

Do You Know the Difference?

Explain how rotation and revolution are different. Try to use as many of these key words as possible:

axis spin orbit

seasons tilt

year day night