8th grade science

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Across
  1. 4. This force pulls objects towards the surface of Earth
  2. 5. Surivial of the fittest
  3. 9. Made when an oceanic plate subducts with a continental plate
  4. 10. These types of currents happen in the Asthenosphere
  5. 13. One tectonic plate slips under another tectonic plate
  6. 15. One method of finding the volume of an object is water ______________
  7. 17. P-waves and S-waves are both types of ____________ waves
  8. 25. Where your genes are located
  9. 26. This variable is the thing that the experimenter changes throughout the experiment
  10. 28. Between two traits, neither is dominant, so both traits show up
  11. 29. Force equals mass times ____________
  12. 30. This type of potential energy depends on the mass and height of an object
Down
  1. 1. Mass divided by volume
  2. 2. This scale measures the magnitude of earthquakes
  3. 3. Igneous rock _____________ are always younger than the rocks they cut through
  4. 6. This type of potential energy is highest when a spring is stretched as far as possible
  5. 7. Free body diagrams help us calculate the ______ force
  6. 8. The step of the scientific method when we set our variables
  7. 11. These are types of forces that help build of the earth
  8. 12. The type of plate boundary where plates move away from each other
  9. 14. The layer of the Earth where plates are located
  10. 16. The least dense layer of Earth
  11. 18. Forces have ____________ and direction
  12. 19. When two alleles are different from each other
  13. 20. Energy released in the form of seismic waves
  14. 21. When sediments are moved to a new location
  15. 22. The type of reproduction that produces identical offspring
  16. 23. A hotspot made this state
  17. 24. The Law of Superposition says the ___________ layer of rock is on the bottom
  18. 27. Two continental plates converge