Across
- 3. (v.) to change a substance back to a harmless natural state by bacteria
- 5. (adj.) with too many people living in a country or a city
- 7. (n.) used water and waste substances produced by human bodies, that are carried away from houses and factories through pipes under the ground
- 11. (v.) to use something, especially fuel, energy or natural materials
- 13. (n.) a failure to understand someone correctly
- 18. (adj.) wearing clothes that are in fashion
- 20. (n.) a feeling of sadness, guilt and embarrassment caused by doing something wrong or stupid
- 21. (v.) to use energy, water, etc. as little as possible so that it lasts a long time
- 22. (n.) an official document stating that you have completed a course of study or passed an examination
- 23. (adj.) describing someone who is not in place because of illness, etc.
- 26. (adj.) not using artificial chemicals in the growing of plants and animals for food or other products
- 29. (adj.) harmful to other people, or to society as a whole
- 30. (n.) the use of energy, food or materials; or the amount that people use
- 31. (v.) to laugh at someone in order to have fun or embarrass him/her
- 33. (n.) a mark on a school record showing that a student has done something wrong or behaved badly at school
- 34. (v.) to treat a waste substance so that it can be used again
- 36. (n.) a substance that pollutes something, especially air and water
- 41. (n.) the state of feeling bored
- 44. (n.) the process of taking too many fish from the sea, a river, etc. that the number of fish in it becomes very low
- 46. (n.) an official record that shows the courses a student has taken and the marks he/she has achieved
- 47. (n.) knowing that something exists and is important
- 53. (n.) a form of energy that is carried by wires, cables, etc., and is used to provide light, heat or power to make machines work
- 54. (adj.) to describe something that is likely to stay in good condition for a long time without breaking or getting weaker, even if used a lot
- 57. (n.) the burning of things until they are completely destroyed
- 58. (n.) a chemical substance used to kill insects and small animals that destroy crops
- 62. (n.) the way that you behave towards someone or something that show how you think and feel
- 66. (adj.) made dirty, polluted or poisonous by the addition of a harmful substance, chemical waste
- 68. (adj.) connected with the way plants and living creatures are related to each other and to their environment
- 70. (n.) actions which hurt others physically
- 71. (n.) the practise of training students to obey rules and control their behaviour, and punishing them if they do not
- 72. (n.) a feeling of sadness because something is not as good as you expected, or has not happened in the way you hoped
- 75. (n.) a student's behaviour in school
- 76. (v.) to put a type of animal, bird or plant back into a region where it once lived
- 77. (n.) the uncomfortable feeling in a social situation
- 78. (adj.) thinking about a person or thing too much or all the time
- 79. (n.) a mark on a school record showing that a student has done something well and is deserving praise
- 80. (n.) the activity of using messages on social networking sites, emails, etc. to frighten or upset someone
Down
- 1. (n.) a form of air pollution that looks like a mixture of smoke and fog, caused by smoke from cars and factories in cities
- 2. (adj.) able to be used again
- 4. (n.) the feeling of sadness because you have no friends
- 6. (n.) the existence of a large number of different kinds of animals and plants which make a balanced environment
- 8. (n.) the process of making air, water, soil, etc. dirty
- 9. (n.) food that remains at the end of a meal after you have finished eating
- 10. (n.) a feeling of worry and nervousness about something
- 12. (n.) a situation in which a plant, an animal, a way of life, etc. stop existing
- 14. (n.) the fact or process of becoming worse
- 15. (n.) an action that is taken in order to make someone suffer because he/she has done something wrong
- 16. (n.) the opposition to authority or the unwillingness to obey rules or accept normal standards of behaviour
- 17. (adj.) able to decay naturally and in the way that is not harmful
- 19. (n.) the act of using something until it is completely finished
- 24. (n.) all the animals and plants in an area, and the way they affect each other and the environment
- 25. (adj.) made to be used once and thrown away
- 27. (n.) smoke or gas that is unpleasant to breathe in
- 28. (n.) a punishment of being kept at school for a time after classes have ended
- 30. (n.) a substance that makes something dirty
- 32. (n.) the pressure and worry caused by problems in your life
- 35. (n.) the planting of new trees in an area where there used to be a forest
- 37. (n.) the practice of treating people differently in an unfair way
- 38. (v.) to study something you have already learnt to prepare for an examination or a test
- 39. (n.) a situation when people spend more money than they should
- 40. (n.) the process of making somewhere, e.g., parks and other areas, greener with trees and plants in a city
- 42. (adj.) able to be recycled
- 43. (n.) the state of being extremely fat
- 45. (adj.) able to continue for a long time without causing damage to the environment
- 48. (n.) a feeling of being annoyed
- 49. (n.) an amount of money that is given by a school or an organisation to help pay for the studies of a person
- 50. (n.) an excessive pride in yourself, especially in your own appearance, abilities or achievements
- 51. (adj.) involving risk or danger, especially to someone's health or safety
- 52. (n.) an argument or a disagreement between people
- 55. (v.) to make a place or substance less pure or make it poisonous
- 56. (n.) the way that someone looks to other people
- 59. (n.) the way in which plants, animals, and people are related to each other and to their environment
- 60. (n.) a natural ability to influence and interest other people and make them admire you
- 61. (n.) the state of feeling very sad and without hope
- 63. (adj.) not behaving in a way which is as calm and wise as people expect from someone of your age
- 64. (n.) the act of cutting down or burning all the trees in an area
- 65. (n.) a substance that causes death or serious illness if it is swallowed or absorbed into the body
- 67. (n.) the red spots appear on the face and neck
- 68. (n.) the process of teaching, training and learning in a school to improve knowledge and develop skills
- 69. (n.) a person who has completed the school studies
- 73. (n.) the period of becoming sexually mature
- 74. (v.) to make a piece of land that is naturally too wet or too dry suitable for farming or building