Science Crossword

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Across
  1. 2. When an object rubs against each other
  2. 4. Repeating disturbance that transfers energy
  3. 10. the process that explains the survival of a species and how they can change over time
  4. 11. Material that waves can travel through
  5. 12. Force that always pulls objects towards each other
  6. 13. waves that move at right angles to primary
  7. 14. Path which an object travels
  8. 18. waves that can travel through a solid and liquid
  9. 21. Happens when two equal forces act on opposite sides
  10. 25. Measures of how many waves pass a point in a certain amount of time
  11. 27. Rocky bodies covered with craters and have unique features
  12. 28. 24 hours long
  13. 29. Location of an object
  14. 30. the middle layer of earth
Down
  1. 1. the center of earth
  2. 3. the age of an object compared to another objects age
  3. 5. A trait or behavior that helps an organism that lived in the past
  4. 6. Can have a gaseous and rocky surface and orbits the sun
  5. 7. The distance between a line through the middle of a wave
  6. 8. waves that are strong enough to shake the earth
  7. 9. Happens when two unequal forces act on opposite sides
  8. 15. Happens when a wave passes through a given point or medium
  9. 16. Chunks of ice that orbits between Mars and Jupiter
  10. 17. outer most layer on earth
  11. 19. Chunks of rock the orbit the solar system
  12. 20. Distance from the crest of a wave to another
  13. 22. protects the planet from many meteors that enter it
  14. 23. preserved remains or traces of an organism that lived in the past
  15. 24. when no other member of a species is still alive
  16. 26. Made of ice,methane,ammonia,and dust and orbits closer and closer to the sun