1. Vocabulary  22. Astronomy – branch of science that deals with celestial objects, space, and the physical universe as a whole.  23. Astrology - study of the movements and relative positions of celestial bodies interpreted as having an influence on human affairs and natural world  24. Geocentric – earth as the center of universe  25. Heliocentric – Sun as center of universe

5. In your Table of Contents write “ Motions of Earth ” Answer these questions in the main part of your science note- book. You do NOT need to copy the questions, just answer them the best you can. 1. What causes day and night to happen? 2. What causes the seasons to change? 3. Why is it cooler in the winter than in the summer? 4. Which hemisphere do we live in?

6. Earth’s Rotation  Earths Axis – ?????

7. Earth’s Rotation  Earths Axis – the imaginary line that extends through earth which it rotates around.  – 23.5 ° from what - ?????

8. Earth’s Rotation  Earths Axis – the imaginary line that extends through earth which it rotates around.  – 23.5 ° from what - a line perpendicular to the orbital plane  Direction of rotation - ??????

9. Earth’s Rotation  Earths Axis – the imaginary line that extends through earth which it rotates around.  – 23.5 ° from what - a line perpendicular to the orbital plane  Direction of rotation – CCW as seen from - ??????

10. Earth’s Rotation  Earths Axis – the imaginary line that extends through earth which it rotates around.  – 23.5 ° from what - a line perpendicular to the orbital plane  Direction of rotation – CCW as seen from – north pole.  Time for 1 rotation - ??????

11. Earth’s Rotation  Earths Axis – the imaginary line that extends through earth which it rotates around.  – 23.5 ° from what - a line perpendicular to the orbital plane  Direction of rotation – CCW as seen from – north pole.  Time for 1 rotation - 24 hours = 1 day

12. Copy the sentences and fill in the blanks: As Earth rotates the part of the planet facing the sun is experiencing ___________, and the part of the planet facing away from the sun is experiencing _________________. Rotation of Earth makes the sun appear to rise in the ______________ and set in the _____________.

13. Earth Around Sun: Revolution: Earth moves around the sun in an elliptical orbit (in a CCW direction as seen from the north pole) 1 Revolution = 365.25 Days = 1 Year (this is why we have a leap year!)

14. Reasons for Seasons Two Reasons (and only 2 reasons) 1. The tilt of Earth ’ s axis. 2. How the sunlight hits Earth. NOTE: Seasons are NOT caused by Earth ’ s distance from the sun! Earth is actually farthest away from the sun in its orbit during summer!

15. Reasons for Seasons  https://www.youtube.com/watch?v=wwdB22opr e0 https://www.youtube.com/watch?v=wwdB22opr e0  Explanation - NOT DISTANCE FROM SUN but the change in the angle of sunlight throughout the year caused by the tilt of the axis.