1. Friday 4/14/17
Notebook Entry: The two pictures below are of the Earth’s moon. What do you notice is different?

2. Does the Moon Rotate?
Rotate the Moon (the penny) by itself. Pay attention to the direction of Abe’s face. What do you notice?
Use the Quarter and the Penny to create a model for what it would look like for the moon to:
Revolve around the Earth while it rotates
Revolve around the Earth without rotating.
Penny = Moon
Quarter = Earth
3. In your spiral draw a diagram for each model. Show the position of the penny at each cross position.
Earth

3. Which one is which?
Near Side
Far Side

4. Near Side of the Moon

5. Far Side of the Moon

8. Key Question
If we know that when we stand anywhere on Earth we only see one side of the moon, does the moon rotate on its axis?

9. Does the Moon Rotate?
Use the Quarter and the Penny to create a model for what it would look like for the moon to:
Revolve around the Earth with one side (Abe’s face) always facing the Earth.
Penny = Moon
Quarter = Earth
Earth
2. In your spiral draw a diagram for the model. Show the position of the penny at each cross position.

10. Synchronous Rotation of Moon

11. What kind of motion does the moon have in space?
Rotates on its axis once in 27.3 Earth days
Revolves around the Earth once in 27.3 Earth days
Synchronized Rotation = length of time for 1 rotation is equal to length of time for 1 revolution.
Must be synchronized for us to only see one side of the Moon from Earth.