1. Sun, Moon, Earth, How do they work together to help life survive? Day and Night

2. Days and Years Astronomy

3. Days and Years Astronomy –Study of the moon, stars and other objects in space.

4. Rotation Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day).

5. Rotation Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day). Axis: 23½º (tilt)

6. Rotation Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day). Axis: 23½º (tilt) –Imaginary line that passes through Earth’s center at the N & S Poles.

7. Earth’s Rotation At the equator the Earth has a circumference of 40,070 km.

8. Earth’s Rotation At the equator the Earth has a circumference of 40,070 km. Rotates once in 24 hours.

9. Earth’s Rotation At the equator the Earth has a circumference of 40,070 km. Rotates once in 24 hours. This means that the speed of the Earth at the equator is 1,670 km/hr (1,070 miles/hr).

10. Earth’s Rotation At the equator the Earth has a circumference of 40,070 km. Rotates once in 24 hours. This means that the speed of the Earth at the equator is 1,670 km/hr (1,070 miles/hr). –At 45 degrees N and S The speed is 1,180 km/hr.

11. Earth’s Rotation At the equator the Earth has a circumference of 40,070 km. Rotates once in 24 hours. This means that the speed of the Earth at the equator is 1,670 km/hr (1,070 miles/hr). –At 45 degrees N and S The speed is 1,180 km/hr. –Winston Salem, NC the speed is about 1,367 km/hr.

13. Facts and Myths The sun rises and sets.

14. Facts and Myths The sun rises and sets. –Myth

15. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light.

16. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light. –Fact

17. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light. –Fact The sun moves across the sky

18. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light. –Fact The sun moves across the sky –Myth

19. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light. –Fact The sun moves across the sky –Myth We spin under the light of the sun.

20. Facts and Myths The sun rises and sets. –Myth The Earth rotates in and out of the sun’s light. –Fact The sun moves across the sky –Myth We spin under the light of the sun. –Fact

21. Rotation vs. Revolution Rotation is the spin of an object about its axis.

22. Rotation vs. Revolution Rotation is the spin of an object about its axis. –The Earth rotates once a day (once every 24 hours).

23. Rotation vs. Revolution Rotation is the spin of an object about its axis. –The Earth rotates once a day (once every 24 hours). Revolution is the orbit of one object around another.

24. Rotation vs. Revolution Rotation is the spin of an object about its axis. –The Earth rotates once a day (once every 24 hours). Revolution is the orbit of one object around another. –The Earth revolves around the Sun every 365.26 days.

26. Day Night Cycle