How Things Work

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Across
  1. 2. – useful or handy for someone’s purpose or need
  2. 4. – to make dirty
  3. 5. – a series of actions used to reach a goal
  4. 7. –people from Europe
  5. 8. – a guess or theory
  6. 10. – microscopic organisms that often play a role in the decay of living things
Down
  1. 1. – a person who comes up with something new
  2. 3. –to remove dirt or unwanted material
  3. 6. – to make a guess
  4. 9. – electricity or heat created by sunlight