Science Puzzle

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Across
  1. 3. the cell group for animals, humans, and plants
  2. 4. power lines conduct _____
  3. 6. you use the _______ system to eat
  4. 9. _____ runs through light bulbs
  5. 12. marble is a ______ rock
  6. 13. most common place for earthquakes
  7. 14. you use a measuring cup to measure _____
  8. 15. leaf falling
Down
  1. 1. obsidian is a _____ rock
  2. 2. car starts moving
  3. 5. you use the _____ system to breathe
  4. 7. you use the ______ system to ride a bike
  5. 8. a garden is ______
  6. 10. a car is easier to move than a truck
  7. 11. someone _____ me off the sidewalk