Across
- 3. Unbiased selection method for sampling location (6)
- 5. The energy levels or orbitals which electrons exist (5)
- 6. Animals that feed on dead plant matter eg worms(9)
- 7. The columns of the periodic table (5)
- 9. Change of a waves direction upon entering a different medium (10)
- 11. EM wave with the longest wavelength (5)
- 14. Organism which breaks down dead animal and plant matter (10)
- 16. Wave where oscillations are parallel to wave travel (12)
- 19. device used to create water waves in a lab (6,4)
- 22. The horizontal rows in the Periodic table (7)
- 23. The last of the three sub-atomic particles to be discovered (7)
- 24. Square shaped apparatus for sampling plant populations (7)
- 25. The major discovery of Rutherford
- 27. The layers of organisms in a food chain (7,5)
Down
- 1. Type of wave used for mobile phone comms (9)
- 2. The way organisms need each other to exist in an ecosystem (15)
- 4. Scientist who discovered the neutron (8)
- 8. The variety of different species in an ecosystem (12)
- 10. The name for group 7 elements (7)
- 12. The name for group 1 metals (6)
- 13. The draining away of nutrients from soil (8)
- 15. Acid produced in anaerobic respiraction in humans (6)
- 17. A reaction where one chemical is replaced by another more reactive one in a compound (12)
- 18. The highest energy EM wave (4)
- 20. Existing in pairs of atoms (8)
- 21. Wave where the oscillations are perpendicular to energy travel (10)
- 26. Type of electromagnetic wave which ionises (4)