Across
- 2. man who discovered the laws of gravity
- 3. what shines on us during the day
- 4. a regular, repeating path that one object in space takes around another one
- 5. the amount of matter
- 6. strength or energy as an attribute of physical action or movement
- 8. gravitational force of attraction
Down
- 1. the force by which a planet or other body draws objects toward its center
- 2. a property of matter
- 5. orbits the Earth
- 7. where we live