Vocabulary

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

2
(No Transcript)
3
(No Transcript)
4
(No Transcript)
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
Earths Rotation

• Earths Axis ?????

7
Earths Rotation

• Earths Axis the imaginary line that extends
  through earth which it rotates around.
• 23.5 from what - ?????

8
Earths 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
Earths 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
Earths 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
Earths 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 Earths axis.
• 2. How the sunlight hits Earth.
• NOTE Seasons are NOT caused by Earths 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?vwwdB22opre0
• Explanation - NOT DISTANCE FROM SUN but the
  change in the angle of sunlight throughout the
  year caused by the tilt of the axis.