Science

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Across
  1. 1. scientist who proposed the theory of evolution
  2. 4. the study of life
  3. 7. substance composed of one oxygen atom and two hydrogen atoms
  4. 8. essential food group used to build muscles
  5. 10. a fossil fuel that is burnt to generate electricity
  6. 13. instrument that measures the total amount of heat in a substance
  7. 14. male hormone
  8. 15. an object that poses a risk to safety
  9. 18. fastest thing in the universe
  10. 22. sharp tooth that pierces flesh
  11. 23. hard substance made from fossil fuel that never breaks down
  12. 24. layer of gases above earths surface
  13. 25. animals that are active at night
  14. 26. radioactive element discovered by Marie Curie in 1898
  15. 27. Australian Christmas tree with orange flowers
  16. 29. smallest unit of matter
  17. 30. element that is the backbone of all life
  18. 31. type of place where an organism lives
  19. 36. the smallest unit of life that all organisms are built of
  20. 39. 17th century physicist who formed the laws of motion
  21. 41. process in which water evaporates from plants
  22. 43. largest bone in the body
  23. 44. non-contact force that has north and south poles
  24. 45. metal that is oxidised
  25. 47. this animal takes up to 2 weeks to digest food
  26. 49. energy source that won't run out
  27. 50. something in an experiment that can be changed, measured, or controlled and can affect the results
  28. 51. substance that can dissolve metal
  29. 54. place in space that swallows stars
  30. 55. substance that is dissolved in a solution
  31. 56. astronomer who was condemned for supporting the heliocentric solar system model
  32. 57. hardest substance on Earth
  33. 58. branch of science that studies matter and substances
Down
  1. 2. 7 metre long organ of the digestive system
  2. 3. energy stored in an object
  3. 5. equipment used in a laboratory to generate heat
  4. 6. this animal has the largest brain
  5. 9. layer in the atmosphere that provides protection from solar radiation
  6. 11. continent with the driest desert
  7. 12. type of energy that transfers heat
  8. 16. type of organism which gives birth to live young and feeds them milk
  9. 17. process of plants using the suns energy to produce sugar
  10. 19. metal that is used to make steel
  11. 20. most dangerous type of radiation that damages DNA
  12. 21. prolific greenhouse gas that causes global warming
  13. 23. classified as dwarf planet in 2006
  14. 27. metal that is liquid at room temperature
  15. 28. the fluid force which resists movement
  16. 32. equipment used to view objects not visible to the naked eye
  17. 33. animal that eats plant and meat
  18. 34. largest organ in the human body
  19. 35. substance that is essential in your diet and can also found in rocks
  20. 37. organ that filters blood
  21. 38. organisms that break down dead organisms to return nutrients to soil
  22. 40. process by which a seed grows roots and first leaves
  23. 42. an aquatic animal that can be immortal
  24. 46. organisms with a backbone
  25. 48. geographical feature that ejects molten rock
  26. 52. energy from the sun
  27. 53. pathogen that is not a living cell and causes illness