How Things Work

12345678910
Across
  1. 3. a person who comes up with something new
  2. 5. useful or handy for someone’s purpose or need
  3. 7. to make dirty
  4. 9. to make a guess
  5. 10. a guess or theory
Down
  1. 1. power electricity or heat created by sunlight
  2. 2. people from Europe
  3. 4. to remove dirt or unwanted material
  4. 6. microscopic organisms that often play a role in the decay of living things
  5. 8. process a series of actions used to reach a goal