Mars Vocabulary

3. the force of attraction between two or more bodies with mass
10. a wide and full view
11. large rocks that orbit the sun
13. chemical compounds that contain carbon and are often found in living things
15. a device that makes a narrow, intense light beam
16. the strength and properties of an object's magnetic field
17. large, sphere-shaped space objects that travel alone in orbits around a star
18. robotic spacecraft launched into space to collect information
21. large, ball-shaped space objects made of hot gases that give off light
22. rocks that fall from space

1. anything that has mass and occupies space
2. the layer of gases around a planet or other space object
4. an iron-rich mineral that usually forms in water
5. solid, natural, nonliving substances made up of chemical elements
6. instruments used to study distant objects by making them appear brighter, nearer, and larger
7. the National Aeronautics and Space Administration, the space agency of the United States
8. the amount of matter in something
9. the path followed by a planet or other space object around another object; to circle a space object
11. an imaginary line through a space object's center about which the object rotates
12. an environment with conditions that can support life
14. bowl-shaped holes on the surface of a space object made by comet or meteorite crashes
15. a space probe that sets down on the surface of a planet or other space object
19. a powerful and sometimes dangerous form of energy that is transmitted in the form of rays, waves, or a stream of particles
20. a space probe that orbits a planet or other space object
22. microorganisms, or living things too small to be seen without a microscope, such as bacteria or viruses