Across
- 4. the mixture of gases surrounding Earth
- 5. Vapor the gaseous state of water
- 7. an object, such as a moon, that orbits another object, such as a planet
- 8. a huge sphere of hydrogen and helium gas that radiates heat and light
- 9. a time in the evening when the sun disappears under the horizon the sun always sets in the west
- 10. a form of oxygen that forms a thin protective layer in the stratosphere
- 12. earth's natural satellite
- 13. the process by which water vapor changes into liquid water usually on a surface
Down
- 1. System the sun and the eight planets and other objects that orbit the sun
- 2. a time in the morning when the sun appears over the horizon, the sun always rises in the east
- 3. a hole formed by an object hitting a surface
- 6. an optical instrument that makes distant objects appear closer and larger
- 8. the star at the center of the Solar System around which all of the other Solar System objects orbit
- 11. to move or travel around an object in a curved path