8th Grade Science Crossword Puzzle

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Across
  1. 1. – A substance with a pH below 7.
  2. 5. tectonics – The theory explaining the movement of Earth’s lithospheric plates.
  3. 6. – A material that does not allow heat or electricity to flow easily.
  4. 12. – A community of living and nonliving things interacting together.
  5. 13. – The process by which a liquid turns into a gas.
  6. 15. – The process by which cells obtain energy from glucose.
  7. 16. – Two or more atoms bonded together.
  8. 17. – The bending of light as it passes from one medium to another.
  9. 21. – A close relationship between two different species.
  10. 22. – The speed of something in a given direction.
  11. 23. – The diffusion of water across a selectively permeable membrane.
  12. 24. – The study of how traits are inherited.
Down
  1. 2. – The tendency of an object to resist a change in motion.
  2. 3. – The substance dissolved in a solution.
  3. 4. – Water that falls to the ground as rain, snow, sleet, or hail.
  4. 7. – The cell structure that contains genetic material (DNA).
  5. 8. – A change in the DNA sequence of an organism.
  6. 9. – An educated guess or prediction in scientific investigations.
  7. 10. – The green pigment in plants that captures light energy.
  8. 11. – A positively charged particle in an atom’s nucleus.
  9. 12. – A protein that speeds up chemical reactions in living things.
  10. 14. – The force that resists the motion of two surfaces sliding against each other.
  11. 18. – The height of a wave from its rest position.
  12. 19. – The basic unit of the nervous system.
  13. 20. – The mass of an object divided by its volume.