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Earth, Moon and Sun System

Earth, Moon and Sun System. Third Rock from the Sun. 70% water Water in all three states (solid, liquid, and gas) Life. Atmosphere of Earth. Oxygen rich Blocks out most of the sun’s damaging rays

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Earth, Moon and Sun System

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  1. Earth, Moon and Sun System

  2. Third Rock from the Sun • 70% water • Water in all three states (solid, liquid, and gas) • Life

  3. Atmosphere of Earth • Oxygen rich • Blocks out most of the sun’s damaging rays • The atmosphere deflects millions of tiny and not so tiny meteors every day that otherwise would have hit the earth and us.

  4. Rotation and Revolution

  5. Axis - the imaginary line that passes through Earth’s center and the North and South poles. Rotation - the spinning of Earth on its axis. A point on the equator rotates at about 1,600 km per hour.

  6. Rotation • Earth’s rotation on its axis causes day and night. • Earth rotates eastward. • It takes 24 hours to rotate once on its axis. This is called a day.

  7. Revolution • Earth also travels around the sun. • Revolution - the movement of one object around another object. • Earth’s orbit is a oval shape.

  8. Calendars • Earth’s orbit around the sun is about 365 1/4 days. • Four years of 365 1/4 days each can be approx. by taking 3 years of 365 days and a fourth year of 366 days. This is known as leap year. • On a leap year, one extra day in February is added for 29 days.

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