Across
- 4. When light bounces off an object
- 6. A natural luminous body visible in the sky especially at night
- 7. A groups of stars and other space objects held together by gravity.
- 10. An empty, blank or available area
- 13. A celestial body that orbits around the Sun
- 14. A type of space object that is smaller than a regular planet
- 15. The large round object that circles the Earth
- 16. When the phase of the moon is getting smaller
- 18. half-moon but less than full
- 20. How much matter something has
- 21. The invisible force that pulls all objects
Down
- 1. An influence that can change the motion of an object.
- 2. A copy of an object that is larger or smaller than its actual size
- 3. Rate at which velocity changes with time, in terms of both speed and direction
- 5. The planet on which we live
- 8. A star which is located at the center of our solar system.
- 9. Small, rocky objects that orbit the Sun.
- 11. The whole mass of air that surrounds the earth
- 12. A repeating path that an object in space takes around another one
- 17. An imaginary line on which a body rotates
- 19. When the phase of the moon are getting bigger