Grade Level: 5th Grade
Gravity is a curious property of our universe. Gravity causes objects to attract each other with a force. The strength of this force depends on the masses of the objects and their distance apart. The direction of the force is from the center of one object toward the center of the other. Although the force is invisible, we can observe its direction by watching how objects move in response to the force.
Martinez, Elizabeth, "Physical Science - GRAVITY ON EARTH: Gravitational Force" (2019). Model NGSS Lessons: 4th - 5th Grade. 14.