Earth

1. The star that provides light and heat
3. A change in the angle of the rotational axis on a rotating body (Ex. The Earth)
7. Force exerted on a surface by the air above it
8. Ability of surfaces to reflect sunlight
9. Second innermost layer of the Earth
10. Average rotation time on Earth
13. radio broadcasting that uses frequency modulation
14. Two tectonic plates that move away from eachother
16. All the water on Earth's surfaces
17. Fourth layer of Earth's atmosphere that absorbs the sun's radiation
18. Negatively charged subatomic particles
20. Air pollution that reduces visibility
22. Outermost layer on Earth
23. Causes the greenhouse effect by trapping heat in the atmosphere

1. an atmosphere of a planet that did not form by accretion during the formation of the planet's star
2. Closest star to the sun
3. The process of plants making food
4. Zone of energetic charged particles around the Earth
5. Chemical that breaks down the ozone layer
6. cosmic snowballs of frozen gases, rock, and dust that orbit the Sun
11. The planet we live on
12. Second planet in the solar system
15. Relating to earth, an inhabitant of Earth
19. A natural light display in the sky caused by interference with magnetic field lines
21. Chemical compound for Ozone