8th Grade Science Review

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Across
  1. 4. rock formed from extreme heat and pressure
  2. 8. the height or intensity of a wave
  3. 9. the process that creates new crust at divergent boundaries
  4. 10. the lowest point on a transverse wave
  5. 12. a segment of DNA
  6. 13. the theory that Earth's structures and movements are caused by moving plates on Earth's surface
  7. 14. rock formed from layers of cemented sediment
  8. 15. waves that do not require a medium
  9. 19. allele that is expressed by a capital letter
  10. 23. structures that have the same function but do not share a common ancestor
  11. 25. X-shaped cellular structures made of coiled up DNA
  12. 27. when humans intervene in reproduction to produce the most desirable traits
  13. 30. energy sources that take millions of years to form
  14. 35. waves that move back and forth
  15. 36. the distance from one point on a wave to the same point on the next wave
Down
  1. 1. the gradual change in a species over time
  2. 2. structures that indicate a common ancestor but may perform different functions
  3. 3. crude oil, natural gas, and coal are examples of these
  4. 5. waves that move up and down
  5. 6. when the DNA from homologous chromosomes is swapped to create genetic variation
  6. 7. plates that move towards each other
  7. 11. any change in the structure of DNA
  8. 16. a trait that helps an organism survive in its environment
  9. 17. rock formed from magma that has cooled
  10. 18. how many waves pass a point in a given amount of time
  11. 20. form of cell division with 2 identical daughter cells
  12. 21. the highest point on a transverse wave
  13. 22. allele that is expressed by a lowercase letter
  14. 24. waves that do require a medium
  15. 26. plates that move away from one another
  16. 28. type of asexual reproduction where a single-celled organism splits itself in half
  17. 29. form of cell division with 4 unique daughter cells
  18. 31. the study of organisms in the early stages of development from zygote to baby
  19. 32. a variation of a gene
  20. 33. plates that slide past one another
  21. 34. energy sources that can be replenished in a short amount of time