Science Crossword

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Across
  1. 2. a cell that can grow into a new organism
  2. 4. a force that acts when two things rub together
  3. 7. the release of a harmful substance into the environment
  4. 8. a natural object that orbits a planet
  5. 10. to make more of one's own kind
  6. 11. to change slowly over time
  7. 12. the control center of a cell
  8. 13. a plant part that contains a plant embryo, or tiny new plant, and stored food
  9. 16. the bending of light when it passes from one material into another
  10. 17. the path of a body in space around another body
  11. 19. the thick fluid inside all cells
  12. 21. curves inward, like a bowl
  13. 23. a plant part that contains seeds
  14. 24. an organism that makes its own food
  15. 25. the force that pulls everything down toward the center of Earth
Down
  1. 1. a consumer that eats mainly plants
  2. 2. the upper layer of Earth's land surface, in which plants grow
  3. 3. dark organic material made up of decayed plant and animal matter
  4. 5. a body in space that moves in a fixed path around a star
  5. 6. to spend the winter in an inactive condition that uses little energy
  6. 9. a push or pull
  7. 14. a measure of the amount of matter in an object
  8. 15. the part of Earth made up of the crust and upper part of the mantle
  9. 18. a material through which heat does not flow easily
  10. 19. an organism that gets energy by eating other organisms
  11. 20. a whirling wind that appears as a dark cloud shaped like a funnel
  12. 22. a hill of sand deposited by wind