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Across 1. A plant hormone. 4. Positively charged ions. 6. Certain bacteria obtain their energy source from _____. 8. The method used to see if the right variables match the hypothesis. 10. These control the ways your body moves and functions. 11. An element with the symbol K. 13. Volcanoes contain molten rock called __________. 14. Controls the rate of growth in plants. 18. A long chain molecule made up of smaller units called monomers. 20. These feed on the remains of deceased animals and plants. 21. This is made of dead plants 300 million tears old. 22. They work on small particles such as bacteria and fungi. 23. An earthquake is a San Andreas _______. 24. A body part that is often useful for forensics investigators. 26. A type of bone located in the ear. 28. Referred to as "White of the eye". 29. The name of the opening in the centre of the iris. 30. Two or more atoms bound together. 32. A natural dispersion of light. 34. A planet as well as an element. 36. The name in which your brain remembers things.

Down 1. Tiny indivisible particles. 2. There is none of this in space. 3. There is static, sliding, rolling and fluid _______. 5. A girls' best friend. 7. Three membranes together are known as ______. 9. Often deliberate, but, natural. 12. Ondotologists examine these at a crime scene. 15. Was used to explore the deepest parts of the ocean. 16. A powerful painkiller. 17. The image seen in a mirror. 19. This element was discovered in 1826. 24. Part of a plant. 25. ______ cells carry out anaerobic respiration. 27. One of Jupiter's moons. 29. The visible part of an ear. 31. The technical word for this is tympanic membrane and is related to a body part. 33. They say there is a frozen ______ on the moons of Jupiter. 35. The coloured part of this is known as the iris.