Day and night

1. Day and night

2. Day and Night • Horizon: an imaginary line where the land seems to meet the sky.

3. Day and night • How does the Sun’s position in the sky change during the day? • Sunrise: The Sun rises on the eastern horizon casting long shadows.

4. Day and Night • Midday: At midday the sun appears high overhead casting short shadows.

5. Day and night • Sunset: The Sun sets on the western horizon casting long shadows.

6. Day and Night • Rotate: to turn around on an axis or center point.

7. Day and Night • What causes day and night? • As the Earth rotates from west to east, the side that faces the Sun experiences day.

8. What causes day and night? • As the Earth rotates from west to east the side facing away from the Sun experiences night.

9. Day and Night • How long does it take for the Earth to make 1 day/night rotation? • It takes 24 hours or one day for Earth to make 1 day/night rotation.

10. Day and Night Quick Check • Earth rotates from ___________ to _____________. • The Sun seems to move across the sky from _________ to __________. • One day on Earth equals _____________.

11. Day and Night • Axis: is a real or imaginary line through the center of a spinning object.

12. Day and Night • Sphere: an object shaped like a ball.

13. Day and Night • Is the Earth’s axis tilted or straight up and down? • The Earth’s axis is tilted 23.5 degrees and runs through the center of the Earth from the North Pole to the South Pole.

14. Day and Night • The Earth is shaped like a ___________. • The Earth’s axis runs from the __________ to the __________. • The Earth’s ________ is tilted ____________.