1. The Earth-Moon System The Big Idea:
Earth & the moon move in consistent patterns. They have predictable effects on each other as they revolve around the sun.
Reference: Textbook:
Science Fusion: Space Science
Holt McDougal, Houghton Mifflin, 2012

2. Spinning around and around…
Rotation- “the spinning of a body, such as a planet, on its axis” (called a day)
(all definitions from Textbook)
Axis: “”an imaginary line about which a body rotates
(definition from Dictionary.com)

3. Important facts about the
Important facts about the
Earth’s rotations:
-Earth revolves on its axis once every hours- this makes Earth’s day
-Earth rotates in a counterclockwise motion
-Earth’s day starts as the sun appears in the east
and ends when the sun sets in the west.   

4. All in a Day’s Work Half of Earth can face the sun at any given time.-
Half of Earth can face the sun at any given time.
Earth is facing the sun, people experience daytime
-The side of the Earth not facing the sun experiences nighttime.

5. As Earth rotates, it revolves around the sun
As Earth rotates, it revolves around the sun. Revolution- “the motion of a body that travels around another body in space” Earth revolves the sun in 365 ¼ days all definitions from Textbook

6. I feel like I’m Leaning a little to the left…
Earth is tilted at 23.5˚ How does this compare to a full circle, half circle, quarter circle?

7. Why are the effects of being at a tilt?
Depending on what Hemisphere you are on:
Longer periods of daylight
Temperature

8. Winter, Spring, Summer, Fall, we love them all!
Seasons – “a specific time of the year that is characterized by recurring weather conditions”
Equinox- “sun shines equally on both hemispheres”
Solstice- “area of sunlight is maximum in one hemisphere & minimum in the other”
Definitions from Textbook

9. Tides
Tides – “daily changes in the level of ocean water.” This change is due to the gravitational forces of the sun and moon across Earth all definitions from Textbook

10. Spring Tides – have the largest daily tidal range, happens “when the sun, moon, & Earth form a straight line.” all definitions from Textbook

11. Neap Tides – “smallest daily tidal range, happen when the sun, moon, & Earth form a 90˚ angle”. Definitions from textbook

12. Venn Diagram Spring Neap

13. The Moon and It’s Phases
Satellites: “A body that orbits a larger body”
Earth’s Natural Satellite: Moon
Moon – natural satellite that travels around planets (revolution days)
What keeps the moon oribiting the Earth?
GRAVITY!
all definitions from Textbook

14. What is an Eclipse?
Eclipse – “an event during which one object in space casts a shadow on another object” (definition from textbook)

15. Describe a Lunar (Moon) Eclipse
“Lunar eclipse occurs when the moon moves through Earth’s shadow” all definitions from Textbook

16. What is a Solar Eclipse?
When the moon is directly between the sun and Earth, the shadow of the moon falls on “part” of Earth all definitions from Textbook