Science and technology

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Across
  1. 3. a piece of body tissue that you make tight and relax in order to move a particular part of the body
  2. 6. the sound or sounds produced through the mouth by a person speaking or singing
  3. 7. a new or difficult task that tests somebody’s ability and skill
  4. 8. the ability to hear
  5. 11. a look on a person’s face that shows their thoughts or feelings
  6. 12. physical or mental activity that you do to stay healthy or become stronger
  7. 13. a person who gives a talk or makes a speech
Down
  1. 1. feeling that you would like to sleep or rest; needing rest
  2. 2. to become different
  3. 4. the process of training somebody to do a job better or to improve a skill
  4. 5. a piece of special flat glass that reflects images
  5. 9. a movement that you make with your hands, your head or your face to show a particular meaning
  6. 10. a person or thing that uses something
  7. 11. the knowledge and skill that you have gained through doing something for a period of time
  8. 14. a machine that can perform a complicated series of tasks by itself