Crossword Puzzle in Physical Science

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Across
  1. 2. is equal to the mass multiplied by the square of the speed of light
  2. 4. this is a disturbance in the regular elliptical movement pattern of a certain celestial body.
  3. 6. as the mass of an object becomes massive, the energy needed to move it becomes
  4. 7. completed his theory of relativity and stated the law of mass energy conversat
  5. 9. this is a force that pulls the objects with mass together
  6. 11. described the motion of planets around the sun, now known as kepler's law of planetary motion.
  7. 13. predicted the theory of electromagnetism and established that lights are also electromagnetic waves.
  8. 15. introduced the universal law of gravitation uniting terrestrial and celestial theories of motion.
  9. 17. Which planet is said to be most affected by the gravitational force of the sun?
  10. 18. is a special type of reference where an observer does not accelerate
  11. 19. time is the difference in time experience by an observer moving at a constant speed
  12. 20. studied, observed, and experimented with inclined planes and introduced the law of falling objects.
Down
  1. 1. an observer perceives length differently while moving at constant speed due to the length
  2. 3. the fastest speed known to man is equal to the speed of
  3. 5. according to the theory of relativity, this is the point when an object that becomes black hole must collapse.
  4. 8. according to general theory of relativity which of the following causes curve in space?
  5. 10. the part of existence that is measured in minutes, days and years.
  6. 12. generated and produced radio waves thereby proving the theory of maxwell.
  7. 14. no two events happen at the same time for two observers is the principle of
  8. 16. a three dimensional extent in which objects and events have relative position and direction.