Across
- 1. The center of mass of two or more bodies orbiting each other
- 3. A tide just after a new or full moon
- 5. A tide just after a first or third quarter moon
- 8. A stream of electrically charged particles
- 9. Fluid being heated
- 10. Day and night are equal in both hemispheres
- 13. Incoming solar radiation
- 15. North and South hemispheres experience their longest or shortest days
- 16. The direct transfer of heat from one substance to another that is touching
- 19. Light energy to convert water and co2 into oxygen
- 21. Transfer of energy through electromagnetic waves
- 24. The process of burning something
- 25. The wobbling of earth's axis changing earth's tilt
Down
- 2. The complete range of electromagnetic waves placed in order of increasing frequency
- 4. The process by which smaller nuclei merge together
- 6. Shortwave radiation emitted by the sun
- 7. The process by which a large nucleus is split into smaller nuclei
- 11. A slow motion of earth's axis that traces out a cone
- 12. Planets made of gas known as "gas giants"
- 14. The point in a planets orbit in which it is closest to the sun
- 17. The Turning, or spinning, of a body on its axis
- 18. The scientific study of the universe
- 20. A large cloud of dust and gas in space
- 22. The point in a planets orbit in which it is furthest to the sun
- 23. The motion of a body, such as a planet or moon, along a path around some point in space