Year 9 Revision

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Across
  1. 4. Breathing is part of what nervous system.
  2. 5. Tells us the number electrons in an atom.
  3. 7. A form of radiation.
  4. 11. The variable that is changed.
  5. 14. A testable explanation or guess.
  6. 15. Part of the endocrine system.
  7. 16. Part of the nervous system.
  8. 17. Piece of evidence for continental drift.
  9. 18. Shared in an ionic bond.
  10. 20. Used to improve reliability.
Down
  1. 1. Different forms of a characteristic.
  2. 2. Least penetrating form of radiation.
  3. 3. Same element with different neutron number.
  4. 6. When half an isotope disappears.
  5. 8. Convection currents occur here.
  6. 9. We live on this layer of the Earth.
  7. 10. We keep this the same in an experiment.
  8. 12. Used during respiration.
  9. 13. The variable that is measured.
  10. 19. Shape of DNA.