U2: Astronomy

123456789101112131415
Across
  1. 3. the change in the direction of the axis, but without any change in tilt
  2. 5. The lowest low ocean tide
  3. 10. the highest high ocean tide
  4. 11. reaction where two atoms combine under heat and pressure
  5. 12. the wobbling during precession that affects seasons
  6. 13. energy that travels from the Sun to the Earth
  7. 15. the process in which plants create energy
Down
  1. 1. All planets move about the Sun in elliptical orbits, having the sun as one of the foci
  2. 2. The point between two objects where they balance each other
  3. 4. orbit of a planet around the Sun; Earth takes 365 days
  4. 6. Describes the relationship between the distance of planets from the Sun, and their orbital periods.
  5. 7. An imaginary line that connects a planet to the sun sweeps out equal areas in equal times
  6. 8. spinning of a planet; Earth takes 24 hours
  7. 9. the release of heat by splitting atoms
  8. 14. revolution of a planet (around the Sun)