1. Earth’s motion

2. Rotation vs. Revolution
The spinning of the Earth on its axis.
The path of the Earth around the Sun.

3. Think Pair Share
How can you differentiate between rotation and revolution?

4. Gravity
Gravity is the force that attracts all objects toward each other.
Law of Universal Gravitation states that every object in the universe attracts every other object.

5. What 2 factors affect the strength of gravity?
Mass
Distance
The greater the mass, the greater the gravitational force.
As the distance between objects increases, the force of gravity decreases.

6. Think Pair Share
Does the gravitational force of the Sun or the Earth have more of an affect on the moon? Explain.

7. Inertia and Orbital Motion
Inertia = the tendency of an object to resist a change in motion.
Orbital Motion = The result of gravity and inertia working together.

8. Think Pair Share
What forces allow the pig to maintain its path?

9. Learning Scale
4 – Create a model that explains how gravity affects the motion of the Sun, Earth, & Moon. 3 – Can explain how gravity affects the motion of the Sun, Earth, & Moon. 2 – With help, can explain how gravity affects the motion of the Sun, Earth, & Moon. 1 – Understands the concept of gravity.