____________ is the governing force in the universe. Gravity keeps the planets orbiting the Sun, the Moon in orbit with the Earth, and us from ____________ away from our planet.
Gravity is not something we can see, but we can ____________ its effects. When a dog leaps off the ground or we throw a baseball, we can observe how they both return to the ground. This happens because gravity is a force of _______________ between two bodies. Gravitational attraction depends on two factors: _________ and distance. The greater the mass and the closer two objects are, the greater the attraction. One example of evidence of this attraction on a large scale is the __________ . Because bodies of water are fluid, they can move freely and in sync with the Moon as it orbits our planet.
Gravity is also responsible for the thrill associated with acceleration. ____________________ proved that objects, regardless of mass, fall at the same acceleration. However, objects on Earth experience air resistance and friction. Because of this, we see lighter objects fall more
slowly and heavier objects fall faster. In a ___________ like space, friction is not a factor, so all objects fall at the same rate. We use the law of gravity and _________________ in our favor when we coast downhill on our bikes, ride a roller coaster, and skydive.
Gravity’s pull on a body provides us with the property of ___________ . When gravity’s effect is less, you weigh less. When gravity’s effect is greater, your weight is greater. This helps us understand why _______________ who visit the Moon seem to bounce about the surface.