Lesson 1: Gravitational Fields
Showing a video of Felix Baumgartner freefalling from the stratosphere displays great visuals of the curvature of the earth and how quickly Felix accelerates due to gravity.
Afterwards, discuss gravity and acceleration due to gravity and make correlations to the previous use of acceleration due to gravity in earlier units.
Introduce Newton's Law of Universal Gravitation.
Discuss what a gravitational field is. Show how gravitational field line patterns differ near Earth and far from Earth.