2. Rotation and Revolution

3. 1. The Earth spinning on its axis. Rotation Revolution 2. Going around a larger body. Rotation Revolution 4. Causes the Earth’s seasons. Revolution Rotation 5. Creates a year. 3. 24 hours. RotationRevolution Rotation 6. The moon going around Earth. RevolutionRotation

4. Spin or Turn on an Axis

5. Axis An imaginary line which runs through both poles of a planet. Examples of things that rotate: tops Ballerinas Figure skaters Cyclones Tornadoes A merry-go-round Earth The time for one rotation on Earth is 24 hours. The speed of Earth’s rotation is 24,855 miles/24 hr or 1,038 miles/hr

6. Earth’s Axis is tilted 23.5 degrees from vertical Vertical Axis Tilted at 23.5 degrees

7. What do you observe about the angle of the tilt?

8. What do you observe about the angle of the tilt? They are all the same

9. Rotation of the Earth causes? Rotation of the Earth causes? A.) Days B.) Months C.) Years D.) Seasons Rotation is the turning and spinning of the Earth in one place on its imaginary axis. Rotation of the earth on its axis causes

10. The Earth Continuously Rotates on its Axis causing Day and Night.

11. Rotation causes day and night. Rotates around once in 24 hours The time required to rotate completely around once is called a day.

12. The Earth Continuously Orbits the Sun or Revolves

13. Revolution: is the movement of one object around a center or another object. The Earth moves in definite pattern around the Sun.

14. PGCC PSC 121 Gage Earth’s revolution

15. It takes 365.25 full rotations for the Earth to go around the Sun once. The time it takes for the Earth to go completely around the Sun is called a year.

16. Each 4 years, one day is added to the month of February to make up for the 0.25 (1/4) rotation in each revolution around the sun. February 29 This is called Leap Year.

17. PlanetsRevolution Around the Sun Mercury87.96 Earth days Venus224.68 Earth days Earth365.26 Earth days Mars686.98 Earth days Jupiter11.862 Earth years Saturn29.456 Earth years Uranus84.07 Earth years Neptune164.81 Earth years Period of Revolution

18. Revolution creates seasons.

19. Why does seasons occur? Seasons occur not because of the distance it is from the sun but due to the Earth’s tilt doesn’t change as it orbits the sun.

20. Hemispheres The Earth is split into 4 hemispheres. Depending on the hemisphere you live in depends on the seasons. We live in the Northern and Western Hemisphere.

24. Let’s Review

25. 1. The Earth spinning on its axis. Rotatio n Revolution 2. Going around a larger body. Rotatio n Revolutio n Revolutio n 4. Causes the Earth’s seasons. Revolutio n Rotatio n 5. Creates a year. 3. 24 hours. Rotatio n Revolutio n Revolutio n Rotatio n 6. The moon going around Earth. Revolutio n Rotatio n